Up next in 10
Code Quality Metrics to Measure and Quantify Quality of Code
0 views
Aug 6, 2025
In this session, we will discuss the importance of code quality and then evaluate various code quality metrics available to measure and benchmark code quality using relevant examples using C#. š Code Quality Conference 2024 https://codequalityconf.com/ šŗ CSharp TV - Dev Streaming Destination http://csharp.tv š C# Corner - Community of Software and Data Developers https://www.c-sharpcorner.com/ #CSharpTV #csharpcorner #CodeQualityConf
View Video Transcript
0:03
so hi all like today I bring you an
0:05
so hi all like today I bring you an
0:05
so hi all like today I bring you an interesting topic like how to measure
0:08
interesting topic like how to measure
0:08
interesting topic like how to measure code quality for the code you write
0:10
code quality for the code you write
0:10
code quality for the code you write definitely it's important and our leads
0:12
definitely it's important and our leads
0:12
definitely it's important and our leads keep bugging us like uh please write
0:14
keep bugging us like uh please write
0:14
keep bugging us like uh please write proper code proper code but no one tells
0:16
proper code proper code but no one tells
0:16
proper code proper code but no one tells us like how to quantify the quality so
0:20
us like how to quantify the quality so
0:20
us like how to quantify the quality so here we will see some techniques or or
0:21
here we will see some techniques or or
0:22
here we will see some techniques or or rather some measures that we can use to
0:25
rather some measures that we can use to
0:25
rather some measures that we can use to actually quantify the quality of
0:27
actually quantify the quality of
0:27
actually quantify the quality of code so before we move into the topic I
0:30
code so before we move into the topic I
0:30
code so before we move into the topic I would like to introduce myself so I work
0:33
would like to introduce myself so I work
0:33
would like to introduce myself so I work as a cloud architect and have a
0:35
as a cloud architect and have a
0:35
as a cloud architect and have a little less than 19 years of Industry
0:38
little less than 19 years of Industry
0:38
little less than 19 years of Industry experience I've designed digital
0:40
experience I've designed digital
0:40
experience I've designed digital Transformations using Cloud Ai and
0:42
Transformations using Cloud Ai and
0:42
Transformations using Cloud Ai and Robotics all these years and I have
0:45
Robotics all these years and I have
0:45
Robotics all these years and I have built Enterprise grade solutions for
0:47
built Enterprise grade solutions for
0:47
built Enterprise grade solutions for large and complex organizations across
0:48
large and complex organizations across
0:49
large and complex organizations across the globe I have published seven books
0:51
the globe I have published seven books
0:51
the globe I have published seven books with as like bpb and appas on asure I'm
0:55
with as like bpb and appas on asure I'm
0:55
with as like bpb and appas on asure I'm toab certified and I am a PhD from swis
0:58
toab certified and I am a PhD from swis
0:58
toab certified and I am a PhD from swis Clow business management in the field of
1:01
Clow business management in the field of
1:01
Clow business management in the field of uh digital transformation in
1:03
uh digital transformation in
1:03
uh digital transformation in healthcare so with this introduction so
1:06
healthcare so with this introduction so
1:06
healthcare so with this introduction so let me move ahead and what I have for
1:09
let me move ahead and what I have for
1:09
let me move ahead and what I have for you is like uh we'll start with on a
1:12
you is like uh we'll start with on a
1:12
you is like uh we'll start with on a very lighter note try to understand why
1:14
very lighter note try to understand why
1:14
very lighter note try to understand why we need to measure code quality in the
1:16
we need to measure code quality in the
1:16
we need to measure code quality in the first place so what is the role of code
1:18
first place so what is the role of code
1:18
first place so what is the role of code quality so once we understand that then
1:21
quality so once we understand that then
1:21
quality so once we understand that then we will be able
1:23
we will be able
1:23
we will be able to understand or interpret the quality
1:26
to understand or interpret the quality
1:26
to understand or interpret the quality metrics that we have in hand and how we
1:28
metrics that we have in hand and how we
1:28
metrics that we have in hand and how we can use this metrics to measure the code
1:30
can use this metrics to measure the code
1:30
can use this metrics to measure the code quality so we'll see that and post that
1:33
quality so we'll see that and post that
1:33
quality so we'll see that and post that like uh like we are going I I'm going to
1:36
like uh like we are going I I'm going to
1:36
like uh like we are going I I'm going to show you I'll open a project a live
1:38
show you I'll open a project a live
1:38
show you I'll open a project a live project and I will show you uh in like
1:42
project and I will show you uh in like
1:42
project and I will show you uh in like in maybe a two to three minutes or a
1:43
in maybe a two to three minutes or a
1:43
in maybe a two to three minutes or a five minutes activity so where I will
1:45
five minutes activity so where I will
1:45
five minutes activity so where I will show you like how to measure the code
1:48
show you like how to measure the code
1:48
show you like how to measure the code quality for that uh entire project and
1:51
quality for that uh entire project and
1:51
quality for that uh entire project and how to interpret it as well and post
1:54
how to interpret it as well and post
1:54
how to interpret it as well and post that uh like uh very important thing end
1:56
that uh like uh very important thing end
1:56
that uh like uh very important thing end of the day everything is a business we
1:58
of the day everything is a business we
1:58
of the day everything is a business we write a code to like
2:00
write a code to like
2:00
write a code to like uh someone earns or makes some Financial
2:02
uh someone earns or makes some Financial
2:02
uh someone earns or makes some Financial benefits out of the code we write and
2:04
benefits out of the code we write and
2:04
benefits out of the code we write and when we have some Financial benefits we
2:07
when we have some Financial benefits we
2:07
when we have some Financial benefits we have uh legal obligations so what is the
2:10
have uh legal obligations so what is the
2:10
have uh legal obligations so what is the impact of bad quality code on business I
2:14
impact of bad quality code on business I
2:14
impact of bad quality code on business I have a snip that I'll show you but uh we
2:17
have a snip that I'll show you but uh we
2:17
have a snip that I'll show you but uh we won't be diving much into the business
2:18
won't be diving much into the business
2:18
won't be diving much into the business impact of uh like code quality okay to
2:24
impact of uh like code quality okay to
2:24
impact of uh like code quality okay to start with why do we need to measure the
2:26
start with why do we need to measure the
2:26
start with why do we need to measure the quality of code so why it is needed
2:30
quality of code so why it is needed
2:30
quality of code so why it is needed so in the very first place so like uh if
2:34
so in the very first place so like uh if
2:34
so in the very first place so like uh if you don't write a proper code we will
2:37
you don't write a proper code we will
2:37
you don't write a proper code we will end up in introducing bug in our code
2:39
end up in introducing bug in our code
2:39
end up in introducing bug in our code base right the delivery will be
2:42
base right the delivery will be
2:42
base right the delivery will be defective you will have very fine guys
2:45
defective you will have very fine guys
2:45
defective you will have very fine guys sitting at the other end of the table
2:47
sitting at the other end of the table
2:47
sitting at the other end of the table and uh like uh chatting out very good
2:50
and uh like uh chatting out very good
2:50
and uh like uh chatting out very good functional requirements they will strike
2:53
functional requirements they will strike
2:53
functional requirements they will strike up very nice discussion with the
2:54
up very nice discussion with the
2:54
up very nice discussion with the customer or you yourself like many times
2:56
customer or you yourself like many times
2:56
customer or you yourself like many times like developers also get part of the
2:59
like developers also get part of the
2:59
like developers also get part of the team that does a business analysis so
3:01
team that does a business analysis so
3:01
team that does a business analysis so during the business analysis process so
3:04
during the business analysis process so
3:04
during the business analysis process so you will have the requirements Crystal
3:07
you will have the requirements Crystal
3:07
you will have the requirements Crystal Clear you'll be able to map all the nfrs
3:10
Clear you'll be able to map all the nfrs
3:10
Clear you'll be able to map all the nfrs so you'll have everything in place then
3:12
so you'll have everything in place then
3:12
so you'll have everything in place then you go and like try to translate those
3:16
you go and like try to translate those
3:16
you go and like try to translate those requirements into code so when you
3:18
requirements into code so when you
3:18
requirements into code so when you translate it if you don't if the
3:20
translate it if you don't if the
3:20
translate it if you don't if the translation is not proper or or rather
3:23
translation is not proper or or rather
3:23
translation is not proper or or rather in a hurry like uh we write a code maybe
3:25
in a hurry like uh we write a code maybe
3:25
in a hurry like uh we write a code maybe for various reasons many times I see
3:28
for various reasons many times I see
3:28
for various reasons many times I see like uh we get a push from from the
3:29
like uh we get a push from from the
3:30
like uh we get a push from from the customer that we need the delivery right
3:31
customer that we need the delivery right
3:31
customer that we need the delivery right away or like something like uh uh we
3:35
away or like something like uh uh we
3:35
away or like something like uh uh we need to like uh do this uh uh
3:39
need to like uh do this uh uh
3:40
need to like uh do this uh uh immediately or something like that due
3:41
immediately or something like that due
3:41
immediately or something like that due to some kind of pressure we end up in
3:43
to some kind of pressure we end up in
3:43
to some kind of pressure we end up in writing some bad buggy code and that
3:45
writing some bad buggy code and that
3:45
writing some bad buggy code and that adds to uh a defect delivery and finally
3:49
adds to uh a defect delivery and finally
3:49
adds to uh a defect delivery and finally what we deliver to the customer is uh
3:51
what we deliver to the customer is uh
3:51
what we deliver to the customer is uh like maybe like it meets the requirement
3:53
like maybe like it meets the requirement
3:53
like maybe like it meets the requirement but when the customer plays around with
3:55
but when the customer plays around with
3:55
but when the customer plays around with it uh then like uh it sees that its
3:58
it uh then like uh it sees that its
3:58
it uh then like uh it sees that its functionalities are not working prop
3:59
functionalities are not working prop
3:59
functionalities are not working prop properly as expected or as outlined
4:03
properly as expected or as outlined
4:03
properly as expected or as outlined during the requirement discussion so
4:05
during the requirement discussion so
4:05
during the requirement discussion so that is one of the areas then we have
4:07
that is one of the areas then we have
4:07
that is one of the areas then we have performance issues like uh very
4:10
performance issues like uh very
4:10
performance issues like uh very challenging so we all face that so like
4:13
challenging so we all face that so like
4:13
challenging so we all face that so like at least my team faces that if my team
4:15
at least my team faces that if my team
4:15
at least my team faces that if my team is watching now this video they can
4:17
is watching now this video they can
4:17
is watching now this video they can actually correlate like uh what I'm
4:20
actually correlate like uh what I'm
4:20
actually correlate like uh what I'm talking about so normally we do a
4:22
talking about so normally we do a
4:22
talking about so normally we do a performance test but rather like uh if
4:26
performance test but rather like uh if
4:26
performance test but rather like uh if you don't write the code properly so we
4:29
you don't write the code properly so we
4:29
you don't write the code properly so we are are liable to introduce performance
4:32
are are liable to introduce performance
4:32
are are liable to introduce performance issues so that can bring down your
4:35
issues so that can bring down your
4:35
issues so that can bring down your system or make your system slow okay so
4:39
system or make your system slow okay so
4:39
system or make your system slow okay so then we have the technical depth that is
4:41
then we have the technical depth that is
4:41
then we have the technical depth that is a very important thing we don't write
4:43
a very important thing we don't write
4:43
a very important thing we don't write proper code okay we don't give proper
4:46
proper code okay we don't give proper
4:46
proper code okay we don't give proper comments we don't indent it properly we
4:49
comments we don't indent it properly we
4:49
comments we don't indent it properly we do all kind of uh things that should not
4:52
do all kind of uh things that should not
4:52
do all kind of uh things that should not be done with the code and we end up
4:55
be done with the code and we end up
4:55
be done with the code and we end up creating a code that is lot of debt like
4:58
creating a code that is lot of debt like
4:58
creating a code that is lot of debt like what I mean by that is as a developer on
5:01
what I mean by that is as a developer on
5:01
what I mean by that is as a developer on the ground I write some bad code okay
5:04
the ground I write some bad code okay
5:04
the ground I write some bad code okay then I hand over the bad code to my like
5:08
then I hand over the bad code to my like
5:08
then I hand over the bad code to my like uh to my to another developer I take a
5:11
uh to my to another developer I take a
5:11
uh to my to another developer I take a release from the project and I move to
5:12
release from the project and I move to
5:12
release from the project and I move to the next project so the other developer
5:15
the next project so the other developer
5:15
the next project so the other developer will not be able to make out much of the
5:17
will not be able to make out much of the
5:17
will not be able to make out much of the things out of the code why because your
5:19
things out of the code why because your
5:19
things out of the code why because your code is uh not having that kind of
5:22
code is uh not having that kind of
5:22
code is uh not having that kind of quality that uh someone can easily read
5:25
quality that uh someone can easily read
5:25
quality that uh someone can easily read it and understand
5:26
it and understand
5:26
it and understand it and and that's how you add a
5:30
it and and that's how you add a
5:30
it and and that's how you add a technical debt to it okay you are adding
5:32
technical debt to it okay you are adding
5:32
technical debt to it okay you are adding a debt to it and uh this debt flows into
5:35
a debt to it and uh this debt flows into
5:35
a debt to it and uh this debt flows into the next thing that is the
5:37
the next thing that is the
5:37
the next thing that is the maintainability okay so the code won't
5:39
maintainability okay so the code won't
5:39
maintainability okay so the code won't be maintainable and you will end up in
5:41
be maintainable and you will end up in
5:41
be maintainable and you will end up in having like writing really bad uh code
5:44
having like writing really bad uh code
5:44
having like writing really bad uh code and uh like it's not maintainable and to
5:48
and uh like it's not maintainable and to
5:48
and uh like it's not maintainable and to whomever you are handling it over or or
5:49
whomever you are handling it over or or
5:49
whomever you are handling it over or or rather like you are on a day leave your
5:51
rather like you are on a day leave your
5:51
rather like you are on a day leave your peer comes and takes up your code he
5:54
peer comes and takes up your code he
5:54
peer comes and takes up your code he won't be able to make out anything out
5:55
won't be able to make out anything out
5:55
won't be able to make out anything out of the code he will like uh and like
5:58
of the code he will like uh and like
5:58
of the code he will like uh and like it's an not easy to maintain and also
6:01
it's an not easy to maintain and also
6:01
it's an not easy to maintain and also like you might have scenarios when there
6:03
like you might have scenarios when there
6:03
like you might have scenarios when there are defects or or you want to add some
6:05
are defects or or you want to add some
6:05
are defects or or you want to add some new features to it okay so if uh when
6:08
new features to it okay so if uh when
6:08
new features to it okay so if uh when you are adding some new features if the
6:10
you are adding some new features if the
6:10
you are adding some new features if the current code base is not clean it will
6:12
current code base is not clean it will
6:12
current code base is not clean it will be very difficult for it like for
6:14
be very difficult for it like for
6:14
be very difficult for it like for example like uh some class you will not
6:17
example like uh some class you will not
6:17
example like uh some class you will not be able to easily inherit okay you won't
6:19
be able to easily inherit okay you won't
6:19
be able to easily inherit okay you won't be able to extend some kind of
6:20
be able to extend some kind of
6:20
be able to extend some kind of functionality in some other code so it's
6:23
functionality in some other code so it's
6:23
functionality in some other code so it's very difficult to maintain that okay so
6:25
very difficult to maintain that okay so
6:25
very difficult to maintain that okay so if the code quality is not proper and
6:28
if the code quality is not proper and
6:28
if the code quality is not proper and with all these
6:30
with all these
6:30
with all these you you end up introducing a business
6:32
you you end up introducing a business
6:32
you you end up introducing a business loss okay because your customer will
6:35
loss okay because your customer will
6:35
loss okay because your customer will take this and whenever any customer
6:38
take this and whenever any customer
6:38
take this and whenever any customer signs a contract they have a penalty
6:40
signs a contract they have a penalty
6:40
signs a contract they have a penalty Clause okay if the delivery is not
6:43
Clause okay if the delivery is not
6:43
Clause okay if the delivery is not proper they can invoke the penalty
6:45
proper they can invoke the penalty
6:45
proper they can invoke the penalty clause and you'll get into the legal
6:47
clause and you'll get into the legal
6:47
clause and you'll get into the legal issues okay the customer will say take
6:51
issues okay the customer will say take
6:51
issues okay the customer will say take okay whatever it is so I I don't want to
6:53
okay whatever it is so I I don't want to
6:54
okay whatever it is so I I don't want to go ahead with
6:55
go ahead with
6:55
go ahead with uh uh like let me just deliver this
6:58
uh uh like let me just deliver this
6:58
uh uh like let me just deliver this project I don't want to go anymore like
7:00
project I don't want to go anymore like
7:00
project I don't want to go anymore like with you I'll find some other vendor for
7:02
with you I'll find some other vendor for
7:02
with you I'll find some other vendor for my other stuff or they can pull out the
7:04
my other stuff or they can pull out the
7:05
my other stuff or they can pull out the project and give it to someone else
7:06
project and give it to someone else
7:06
project and give it to someone else resulting in business loss and you'll
7:08
resulting in business loss and you'll
7:08
resulting in business loss and you'll get into legal Tangles like because they
7:10
get into legal Tangles like because they
7:10
get into legal Tangles like because they will invoke the penalty clause and in
7:12
will invoke the penalty clause and in
7:12
will invoke the penalty clause and in turn everything will lead to a
7:14
turn everything will lead to a
7:14
turn everything will lead to a reputation loss okay so like next time
7:17
reputation loss okay so like next time
7:17
reputation loss okay so like next time the customer will not like
7:19
the customer will not like
7:19
the customer will not like to get into this and at the same time
7:23
to get into this and at the same time
7:23
to get into this and at the same time they won't be able to like um drive this
7:27
they won't be able to like um drive this
7:27
they won't be able to like um drive this further or or or like they won't be be
7:29
further or or or like they won't be be
7:29
further or or or like they won't be be able to do a word of mouth to other
7:31
able to do a word of mouth to other
7:31
able to do a word of mouth to other customers in that reason as a result of
7:34
customers in that reason as a result of
7:34
customers in that reason as a result of which like uh in the industry like you
7:36
which like uh in the industry like you
7:36
which like uh in the industry like you won't have a good reputation and no one
7:38
won't have a good reputation and no one
7:38
won't have a good reputation and no one will come and take your code or or or
7:41
will come and take your code or or or
7:41
will come and take your code or or or take your service to build some product
7:43
take your service to build some product
7:43
take your service to build some product or
7:44
or
7:44
or something okay so with this background
7:48
something okay so with this background
7:48
something okay so with this background so let's see what are the different code
7:50
so let's see what are the different code
7:50
so let's see what are the different code quality
7:51
quality
7:51
quality metrics we have the very first two
7:54
metrics we have the very first two
7:54
metrics we have the very first two metrics that I show you here is like um
7:59
metrics that I show you here is like um
7:59
metrics that I show you here is like um like these are the golden metrics I
8:01
like these are the golden metrics I
8:01
like these are the golden metrics I would call out whenever you write any
8:03
would call out whenever you write any
8:03
would call out whenever you write any code so you should actually measure this
8:07
code so you should actually measure this
8:07
code so you should actually measure this uh metrics okay one is the very famous
8:10
uh metrics okay one is the very famous
8:10
uh metrics okay one is the very famous holed software metrics it's a very
8:12
holed software metrics it's a very
8:12
holed software metrics it's a very famous one and what exactly it is is so
8:16
famous one and what exactly it is is so
8:16
famous one and what exactly it is is so it goes to the roots of how the
8:18
it goes to the roots of how the
8:18
it goes to the roots of how the programming languages are built any of
8:20
programming languages are built any of
8:20
programming languages are built any of the programming languages it can be
8:22
the programming languages it can be
8:22
the programming languages it can be built using either it can be built or or
8:26
built using either it can be built or or
8:26
built using either it can be built or or when you write any program it comprises
8:28
when you write any program it comprises
8:28
when you write any program it comprises of tokens okay so what are these tokens
8:31
of tokens okay so what are these tokens
8:31
of tokens okay so what are these tokens they can be operant or operators okay so
8:36
they can be operant or operators okay so
8:36
they can be operant or operators okay so these uh operant and operators can
8:39
these uh operant and operators can
8:39
these uh operant and operators can actually Define the complexity like for
8:42
actually Define the complexity like for
8:42
actually Define the complexity like for example you writing something a code
8:44
example you writing something a code
8:44
example you writing something a code like int a equals B plus C okay this
8:48
like int a equals B plus C okay this
8:48
like int a equals B plus C okay this equal to is your operator the plus is an
8:50
equal to is your operator the plus is an
8:50
equal to is your operator the plus is an operator maybe let me show you in uh
8:53
operator maybe let me show you in uh
8:53
operator maybe let me show you in uh draw.io I'll be able to talk about like
8:56
draw.io I'll be able to talk about like
8:56
draw.io I'll be able to talk about like what I'm trying to say
8:59
what I'm trying to say
8:59
what I'm trying to say okay suppose I write a code something
9:01
okay suppose I write a code something
9:02
okay suppose I write a code something like this int a equal to B+ C I'll make
9:05
like this int a equal to B+ C I'll make
9:05
like this int a equal to B+ C I'll make it big so that it's well
9:11
visible
9:13
visible
9:13
visible text I'll make
9:23
it
9:26
it
9:26
it sorry okay
9:32
for some
9:34
for some
9:34
for some reasons okay this is good okay I write
9:37
reasons okay this is good okay I write
9:37
reasons okay this is good okay I write int a equals B plus C so equal to and
9:41
int a equals B plus C so equal to and
9:42
int a equals B plus C so equal to and plus are operators and all these are
9:44
plus are operators and all these are
9:44
plus are operators and all these are tokens in this variable a b c okay your
9:48
tokens in this variable a b c okay your
9:48
tokens in this variable a b c okay your program is nothing but it constitutes of
9:50
program is nothing but it constitutes of
9:50
program is nothing but it constitutes of all such tokens that can be either
9:52
all such tokens that can be either
9:52
all such tokens that can be either operator or your uh like these
9:57
operator or your uh like these
9:57
operator or your uh like these operants so these since our code
10:01
operants so these since our code
10:01
operants so these since our code consists of only this uh like operators
10:03
consists of only this uh like operators
10:03
consists of only this uh like operators or operants so these are the only areas
10:06
or operants so these are the only areas
10:06
or operants so these are the only areas or these are actually the areas that
10:08
or these are actually the areas that
10:08
or these are actually the areas that will add to the complexity of the code
10:11
will add to the complexity of the code
10:11
will add to the complexity of the code that's what like um Hall State software
10:15
that's what like um Hall State software
10:15
that's what like um Hall State software metrics talks about it's a colle any
10:17
metrics talks about it's a colle any
10:17
metrics talks about it's a colle any software program is a collection of
10:19
software program is a collection of
10:19
software program is a collection of tokens tokens that can be operat or
10:21
tokens tokens that can be operat or
10:21
tokens tokens that can be operat or operators and tokens Define the
10:24
operators and tokens Define the
10:24
operators and tokens Define the complexity and volume of a software
10:26
complexity and volume of a software
10:26
complexity and volume of a software volume why because more the number of
10:28
volume why because more the number of
10:28
volume why because more the number of lines of code more more uh Hefty is your
10:30
lines of code more more uh Hefty is your
10:30
lines of code more more uh Hefty is your software and uh how do you quantify the
10:33
software and uh how do you quantify the
10:33
software and uh how do you quantify the volume by this operant operators and all
10:37
volume by this operant operators and all
10:37
volume by this operant operators and all so how do you see as per Hall State it's
10:40
so how do you see as per Hall State it's
10:40
so how do you see as per Hall State it's not me who saying it's the hall State
10:42
not me who saying it's the hall State
10:42
not me who saying it's the hall State what Hallstead is proposed is any
10:44
what Hallstead is proposed is any
10:44
what Hallstead is proposed is any program length can be the total tokens
10:46
program length can be the total tokens
10:46
program length can be the total tokens in a program okay that means the number
10:48
in a program okay that means the number
10:48
in a program okay that means the number of operates and operators the program
10:51
of operates and operators the program
10:51
of operates and operators the program volume is nothing but it's the size of
10:53
volume is nothing but it's the size of
10:53
volume is nothing but it's the size of programming memory okay what is volume
10:56
programming memory okay what is volume
10:57
programming memory okay what is volume volume is a space that anything takes
10:59
volume is a space that anything takes
10:59
volume is a space that anything takes right so your program will take some
11:01
right so your program will take some
11:01
right so your program will take some space in the memory so the program
11:03
space in the memory so the program
11:03
space in the memory so the program volume is the size the program takes in
11:06
volume is the size the program takes in
11:06
volume is the size the program takes in the memory and program levels is the
11:08
the memory and program levels is the
11:08
the memory and program levels is the levels of abstraction provided by a
11:10
levels of abstraction provided by a
11:10
levels of abstraction provided by a program okay so when I say abstraction
11:13
program okay so when I say abstraction
11:13
program okay so when I say abstraction go think about the oops principle okay
11:15
go think about the oops principle okay
11:15
go think about the oops principle okay in objectoriented programming we
11:17
in objectoriented programming we
11:17
in objectoriented programming we abstract classes right so that what is
11:20
abstract classes right so that what is
11:20
abstract classes right so that what is there underhood is not visible we just
11:22
there underhood is not visible we just
11:22
there underhood is not visible we just make it visible what needs to be
11:24
make it visible what needs to be
11:24
make it visible what needs to be consumed or to be known by the end
11:26
consumed or to be known by the end
11:26
consumed or to be known by the end consumer not everything how it functions
11:29
consumer not everything how it functions
11:29
consumer not everything how it functions okay so the number of levels of
11:31
okay so the number of levels of
11:31
okay so the number of levels of abstractions we add that adds to the
11:35
abstractions we add that adds to the
11:35
abstractions we add that adds to the program level okay so with this three
11:38
program level okay so with this three
11:38
program level okay so with this three like program length program volume and
11:40
like program length program volume and
11:40
like program length program volume and program level are very famous software
11:42
program level are very famous software
11:42
program level are very famous software metrics that you should consider while
11:45
metrics that you should consider while
11:45
metrics that you should consider while like uh quantifying your code quality
11:48
like uh quantifying your code quality
11:48
like uh quantifying your code quality but these are not the ones there these
11:50
but these are not the ones there these
11:50
but these are not the ones there these are not the only ones there are lot of
11:52
are not the only ones there are lot of
11:52
are not the only ones there are lot of other metrics that H has proposed just
11:55
other metrics that H has proposed just
11:55
other metrics that H has proposed just for like we have a very short period so
11:57
for like we have a very short period so
11:57
for like we have a very short period so I can't uh uh take this Hall St end to
12:00
I can't uh uh take this Hall St end to
12:00
I can't uh uh take this Hall St end to end so like these are the main ones the
12:03
end so like these are the main ones the
12:03
end so like these are the main ones the next one is the cyclopedic complexity
12:06
next one is the cyclopedic complexity
12:06
next one is the cyclopedic complexity okay that is nothing but the flow of
12:08
okay that is nothing but the flow of
12:08
okay that is nothing but the flow of your code how your code flows okay for
12:11
your code how your code flows okay for
12:11
your code how your code flows okay for example let me again go
12:15
example let me again go
12:15
example let me again go here okay I write
12:18
here okay I write
12:18
here okay I write if a greater than
12:21
if a greater than
12:21
if a greater than b okay
12:27
then conso dot right
12:36
line hello
12:41
Okay one
12:51
minute
12:53
minute
12:53
minute okay
12:55
okay
12:55
okay else I write
13:03
console. right
13:09
line he so in this piece of code okay
13:13
line he so in this piece of code okay
13:13
line he so in this piece of code okay whatever piece of code I have
13:15
whatever piece of code I have
13:15
whatever piece of code I have here just
13:17
here just
13:17
here just one so whatever piece of code I have
13:20
one so whatever piece of code I have
13:20
one so whatever piece of code I have here so like you can see like uh one
13:23
here so like you can see like uh one
13:23
here so like you can see like uh one thing like uh uh it has two path correct
13:27
thing like uh uh it has two path correct
13:27
thing like uh uh it has two path correct one is this uh if if a is greater than b
13:30
one is this uh if if a is greater than b
13:30
one is this uh if if a is greater than b then we take this path like console.
13:32
then we take this path like console.
13:32
then we take this path like console. right line hello okay
13:36
right line hello okay
13:36
right line hello okay if if uh it's the other path then like
13:40
if if uh it's the other path then like
13:40
if if uh it's the other path then like else path then we have cons. right line
13:43
else path then we have cons. right line
13:43
else path then we have cons. right line High okay so my code has two path here
13:46
High okay so my code has two path here
13:46
High okay so my code has two path here okay if it would have been for example a
13:48
okay if it would have been for example a
13:48
okay if it would have been for example a while loop while a less than 10 so my
13:51
while loop while a less than 10 so my
13:51
while loop while a less than 10 so my code has 10 path okay there can be
13:53
code has 10 path okay there can be
13:53
code has 10 path okay there can be nested paths as well like we can have
13:55
nested paths as well like we can have
13:55
nested paths as well like we can have nested hips nested uh uh Loops so all
13:59
nested hips nested uh uh Loops so all
13:59
nested hips nested uh uh Loops so all these contribute to like cyclomatic
14:02
these contribute to like cyclomatic
14:02
these contribute to like cyclomatic complexity why it is complex because you
14:05
complexity why it is complex because you
14:06
complexity why it is complex because you are opening multiple paths in your code
14:10
are opening multiple paths in your code
14:10
are opening multiple paths in your code okay your execution can take multiple
14:12
okay your execution can take multiple
14:12
okay your execution can take multiple paths in your code okay so that is why
14:16
paths in your code okay so that is why
14:16
paths in your code okay so that is why we like introduce uh cyclomatic
14:18
we like introduce uh cyclomatic
14:18
we like introduce uh cyclomatic complexity
14:21
complexity
14:21
complexity correct so if you go by cyclomatic uh
14:24
correct so if you go by cyclomatic uh
14:24
correct so if you go by cyclomatic uh complexity here in this case my cytic
14:27
complexity here in this case my cytic
14:27
complexity here in this case my cytic complexity can be calculated ated as two
14:30
complexity can be calculated ated as two
14:30
complexity can be calculated ated as two based on the number of path it is taking
14:33
based on the number of path it is taking
14:33
based on the number of path it is taking okay so coming back here so what is
14:35
okay so coming back here so what is
14:35
okay so coming back here so what is cyclet complexity it is based on your
14:38
cyclet complexity it is based on your
14:38
cyclet complexity it is based on your code flow how your code flows okay more
14:41
code flow how your code flows okay more
14:41
code flow how your code flows okay more the number of code flows higher is the
14:43
the number of code flows higher is the
14:43
the number of code flows higher is the complexity greater is the probability of
14:45
complexity greater is the probability of
14:45
complexity greater is the probability of error why because if you have 10 paths
14:48
error why because if you have 10 paths
14:48
error why because if you have 10 paths like if Els if Els like this you have 10
14:51
like if Els if Els like this you have 10
14:51
like if Els if Els like this you have 10 paths okay so you may not be able to
14:54
paths okay so you may not be able to
14:54
paths okay so you may not be able to code coverage everything okay there then
14:57
code coverage everything okay there then
14:57
code coverage everything okay there then like there are high chances that some
14:59
like there are high chances that some
14:59
like there are high chances that some some piece of code will some path will
15:01
some piece of code will some path will
15:01
some piece of code will some path will get untested and like there uh is a
15:03
get untested and like there uh is a
15:03
get untested and like there uh is a chance that if if you have done some
15:06
chance that if if you have done some
15:06
chance that if if you have done some mistake there there is a probability
15:08
mistake there there is a probability
15:08
mistake there there is a probability that uh you are introducing an error and
15:11
that uh you are introducing an error and
15:11
that uh you are introducing an error and number of paths the program takes it is
15:12
number of paths the program takes it is
15:12
number of paths the program takes it is the cyclomatic complexity so these two
15:15
the cyclomatic complexity so these two
15:15
the cyclomatic complexity so these two are the golden metrics apart from it
15:18
are the golden metrics apart from it
15:18
are the golden metrics apart from it from Microsoft documentation you can see
15:21
from Microsoft documentation you can see
15:21
from Microsoft documentation you can see few more uh metrics like maintainability
15:24
few more uh metrics like maintainability
15:24
few more uh metrics like maintainability index okay so how well you can maintain
15:28
index okay so how well you can maintain
15:28
index okay so how well you can maintain your pro this is very important and
15:31
your pro this is very important and
15:31
your pro this is very important and whenever you are measuring the
15:32
whenever you are measuring the
15:32
whenever you are measuring the maintainability index make sure your
15:35
maintainability index make sure your
15:35
maintainability index make sure your code should be between 20 to 100 uh see
15:38
code should be between 20 to 100 uh see
15:38
code should be between 20 to 100 uh see above 50 is very difficult but at least
15:40
above 50 is very difficult but at least
15:40
above 50 is very difficult but at least 40 to 60 it should 40 to 50 like it
15:43
40 to 60 it should 40 to 50 like it
15:43
40 to 60 it should 40 to 50 like it should be ideally 10 to 20 is considered
15:46
should be ideally 10 to 20 is considered
15:46
should be ideally 10 to 20 is considered modate but if you are having a low score
15:49
modate but if you are having a low score
15:49
modate but if you are having a low score like 0 to 9 it is very dangerous and how
15:51
like 0 to 9 it is very dangerous and how
15:52
like 0 to 9 it is very dangerous and how it is deduced it is deduced from a
15:55
it is deduced it is deduced from a
15:55
it is deduced it is deduced from a formula I don't have the formula handy
15:57
formula I don't have the formula handy
15:57
formula I don't have the formula handy here you can go to the Microsoft site
15:59
here you can go to the Microsoft site
15:59
here you can go to the Microsoft site and see that it takes a len of a
16:02
and see that it takes a len of a
16:03
and see that it takes a len of a logarithmic calculation of Hall State
16:05
logarithmic calculation of Hall State
16:05
logarithmic calculation of Hall State volume cyclomatic complexity and the
16:08
volume cyclomatic complexity and the
16:08
volume cyclomatic complexity and the number of lines of code your code base
16:10
number of lines of code your code base
16:10
number of lines of code your code base has okay based on this like it does it
16:13
has okay based on this like it does it
16:13
has okay based on this like it does it calculates an index and that index is
16:16
calculates an index and that index is
16:16
calculates an index and that index is between 0 to 100 zero is very is less
16:18
between 0 to 100 zero is very is less
16:18
between 0 to 100 zero is very is less maintainable 100 is most most
16:21
maintainable 100 is most most
16:21
maintainable 100 is most most maintainable that is what the
16:22
maintainable that is what the
16:22
maintainable that is what the maintainability index speaks
16:25
maintainability index speaks
16:25
maintainability index speaks about
16:27
about
16:27
about Okay so uh like what is the importance
16:30
Okay so uh like what is the importance
16:30
Okay so uh like what is the importance of this so when you have a low
16:32
of this so when you have a low
16:32
of this so when you have a low maintainability index that clearly says
16:34
maintainability index that clearly says
16:34
maintainability index that clearly says that you can't hand over the code to
16:36
that you can't hand over the code to
16:36
that you can't hand over the code to someone and if you're handing it over
16:39
someone and if you're handing it over
16:39
someone and if you're handing it over then like he's going to struggle with
16:41
then like he's going to struggle with
16:41
then like he's going to struggle with understanding the code and uh taking
16:43
understanding the code and uh taking
16:43
understanding the code and uh taking your code forward apart from it if you
16:45
your code forward apart from it if you
16:45
your code forward apart from it if you introduce a new feature then if you see
16:47
introduce a new feature then if you see
16:47
introduce a new feature then if you see a maintainability index score of a uh is
16:50
a maintainability index score of a uh is
16:50
a maintainability index score of a uh is is so less then you should uh like it's
16:52
is so less then you should uh like it's
16:52
is so less then you should uh like it's very difficult to add uh feature and all
16:55
very difficult to add uh feature and all
16:55
very difficult to add uh feature and all and I will give you a very nice example
16:57
and I will give you a very nice example
16:57
and I will give you a very nice example like few years back like we were taking
16:59
like few years back like we were taking
16:59
like few years back like we were taking a project from another vendor okay so it
17:02
a project from another vendor okay so it
17:02
a project from another vendor okay so it was a vendor switch the very first thing
17:04
was a vendor switch the very first thing
17:04
was a vendor switch the very first thing that we did was we calculated the
17:06
that we did was we calculated the
17:06
that we did was we calculated the maintainability index but again this was
17:08
maintainability index but again this was
17:08
maintainability index but again this was not this formula we never used uh we
17:10
not this formula we never used uh we
17:10
not this formula we never used uh we used hallad volume and cyclet complexity
17:13
used hallad volume and cyclet complexity
17:13
used hallad volume and cyclet complexity but lines of code was not facted in so
17:15
but lines of code was not facted in so
17:15
but lines of code was not facted in so we used uh we calculated the
17:18
we used uh we calculated the
17:18
we used uh we calculated the maintainability index and we saw that
17:20
maintainability index and we saw that
17:20
maintainability index and we saw that the maintainability of the code is very
17:22
the maintainability of the code is very
17:22
the maintainability of the code is very low we went back to the customer and
17:25
low we went back to the customer and
17:25
low we went back to the customer and said that the code is not maintainable
17:27
said that the code is not maintainable
17:27
said that the code is not maintainable at all we can't take a and uh get
17:30
at all we can't take a and uh get
17:30
at all we can't take a and uh get started with it right away this code
17:32
started with it right away this code
17:32
started with it right away this code requires refactoring okay so what is the
17:36
requires refactoring okay so what is the
17:37
requires refactoring okay so what is the next thing that will fall from or like
17:39
next thing that will fall from or like
17:39
next thing that will fall from or like that will happen from this uh
17:41
that will happen from this uh
17:41
that will happen from this uh maintainability index that is nothing
17:43
maintainability index that is nothing
17:43
maintainability index that is nothing but like uh refactoring of the code okay
17:46
but like uh refactoring of the code okay
17:47
but like uh refactoring of the code okay if the code is not maintainable so the
17:49
if the code is not maintainable so the
17:49
if the code is not maintainable so the maintainable index will be low so that
17:52
maintainable index will be low so that
17:52
maintainable index will be low so that is where you can decide on to make the
17:54
is where you can decide on to make the
17:54
is where you can decide on to make the code maintainable I need to refactor and
17:56
code maintainable I need to refactor and
17:56
code maintainable I need to refactor and again do it so for our customer like
17:58
again do it so for our customer like
17:58
again do it so for our customer like with the the project contracts were
18:00
with the the project contracts were
18:00
with the the project contracts were changed and customer we could prove the
18:02
changed and customer we could prove the
18:03
changed and customer we could prove the customer that this is the score that
18:04
customer that this is the score that
18:04
customer that this is the score that comes and we are not going to take this
18:06
comes and we are not going to take this
18:06
comes and we are not going to take this project ases and maintain it so we need
18:08
project ases and maintain it so we need
18:08
project ases and maintain it so we need to refactor it and then take it forward
18:11
to refactor it and then take it forward
18:11
to refactor it and then take it forward so this it changed the scope of the
18:13
so this it changed the scope of the
18:13
so this it changed the scope of the contract the S got changed okay so
18:17
contract the S got changed okay so
18:17
contract the S got changed okay so another important thing is depth of
18:19
another important thing is depth of
18:19
another important thing is depth of inheritance I'll give you
18:21
inheritance I'll give you
18:21
inheritance I'll give you example let me again go back to
18:25
example let me again go back to
18:25
example let me again go back to draw. okay I have a class A
18:38
okay I have a class here we have another
18:43
okay I have a class here we have another
18:43
okay I have a class here we have another class B
18:45
class B
18:45
class B okay we
18:49
have a third class C okay
18:55
have a third class C okay
18:55
have a third class C okay and we have
18:58
and we have
18:58
and we have say another class D I'll give an
19:01
say another class D I'll give an
19:01
say another class D I'll give an example okay
19:05
example okay
19:05
example okay B inherits from a c inherits for
19:11
B inherits from a c inherits for
19:11
B inherits from a c inherits for D and D inherits again
19:15
D and D inherits again
19:15
D and D inherits again from a okay this is how your inheritance
19:20
from a okay this is how your inheritance
19:20
from a okay this is how your inheritance looks like may be any programming
19:22
looks like may be any programming
19:22
looks like may be any programming language these are our classes a b c and
19:24
language these are our classes a b c and
19:24
language these are our classes a b c and d are classes so here we have three
19:27
d are classes so here we have three
19:27
d are classes so here we have three levels of inheritance okay we have three
19:30
levels of inheritance okay we have three
19:30
levels of inheritance okay we have three levels of inheritance suppose B is
19:33
levels of inheritance suppose B is
19:34
levels of inheritance suppose B is implementing a function from a I mean to
19:36
implementing a function from a I mean to
19:36
implementing a function from a I mean to say like B is like uh overriding a
19:39
say like B is like uh overriding a
19:39
say like B is like uh overriding a function from a okay and D is also
19:42
function from a okay and D is also
19:42
function from a okay and D is also overriding the same function and there
19:43
overriding the same function and there
19:43
overriding the same function and there is some changes in that function or
19:45
is some changes in that function or
19:45
is some changes in that function or overloading sorry let's call it uh
19:48
overloading sorry let's call it uh
19:48
overloading sorry let's call it uh overloading okay so it's both of them
19:50
overloading okay so it's both of them
19:50
overloading okay so it's both of them are overloading some function from a and
19:52
are overloading some function from a and
19:52
are overloading some function from a and both and a there is some change in the
19:54
both and a there is some change in the
19:54
both and a there is some change in the base class so what will happen is the
19:56
base class so what will happen is the
19:56
base class so what will happen is the normally like what the developer did was
19:58
normally like what the developer did was
19:58
normally like what the developer did was he made some changes in class A based on
20:01
he made some changes in class A based on
20:01
he made some changes in class A based on the requirements of D okay then this B
20:03
the requirements of D okay then this B
20:03
the requirements of D okay then this B and C goes into toss okay because he did
20:07
and C goes into toss okay because he did
20:07
and C goes into toss okay because he did not consider or studied BNC properly
20:09
not consider or studied BNC properly
20:09
not consider or studied BNC properly without studying BNC he CH made some
20:12
without studying BNC he CH made some
20:12
without studying BNC he CH made some changes in the Base Class based on the
20:13
changes in the Base Class based on the
20:13
changes in the Base Class based on the requirements from D so your entire
20:15
requirements from D so your entire
20:15
requirements from D so your entire system goes on scoop okay so there your
20:19
system goes on scoop okay so there your
20:19
system goes on scoop okay so there your uh it becomes complex so the depth of
20:22
uh it becomes complex so the depth of
20:22
uh it becomes complex so the depth of inheritance is very important for
20:24
inheritance is very important for
20:24
inheritance is very important for example like I'll give you another
20:25
example like I'll give you another
20:25
example like I'll give you another example so like a makes some changes B
20:28
example so like a makes some changes B
20:28
example so like a makes some changes B is inheriting it so the changes are in
20:31
is inheriting it so the changes are in
20:31
is inheriting it so the changes are in accordance to B but C is also inheriting
20:33
accordance to B but C is also inheriting
20:33
accordance to B but C is also inheriting from B and it's it can't consume the
20:35
from B and it's it can't consume the
20:35
from B and it's it can't consume the changes that a has made okay so like
20:38
changes that a has made okay so like
20:38
changes that a has made okay so like again like we are introducing error in
20:40
again like we are introducing error in
20:40
again like we are introducing error in this inheritance so number of levels of
20:43
this inheritance so number of levels of
20:43
this inheritance so number of levels of inheritance that is nothing but your
20:45
inheritance that is nothing but your
20:45
inheritance that is nothing but your depth of inheritance in this case the
20:46
depth of inheritance in this case the
20:46
depth of inheritance in this case the depth of inheritance is
20:48
depth of inheritance is
20:48
depth of inheritance is three okay
20:51
three okay
20:51
three okay so let me go
20:53
so let me go
20:53
so let me go here so all all that I said number of
20:57
here so all all that I said number of
20:57
here so all all that I said number of different classes that inherent from one
20:59
different classes that inherent from one
20:59
different classes that inherent from one another and more The Inheritance greater
21:01
another and more The Inheritance greater
21:01
another and more The Inheritance greater is the chance for introducing error due
21:03
is the chance for introducing error due
21:03
is the chance for introducing error due to modification in Base Class okay so
21:06
to modification in Base Class okay so
21:06
to modification in Base Class okay so keep your inheritance minimum but again
21:08
keep your inheritance minimum but again
21:08
keep your inheritance minimum but again you need to inherit or else like your
21:09
you need to inherit or else like your
21:09
you need to inherit or else like your code uh will not be reusable but you
21:12
code uh will not be reusable but you
21:12
code uh will not be reusable but you need to strike that balance so you need
21:13
need to strike that balance so you need
21:14
need to strike that balance so you need to write a proper code but keep
21:16
to write a proper code but keep
21:16
to write a proper code but keep measuring the depth of
21:18
measuring the depth of
21:18
measuring the depth of inheritance another important thing is
21:20
inheritance another important thing is
21:20
inheritance another important thing is class coupling that we know right what
21:22
class coupling that we know right what
21:22
class coupling that we know right what we do when we are writing any code like
21:25
we do when we are writing any code like
21:25
we do when we are writing any code like we have two functions okay so in one
21:27
we have two functions okay so in one
21:27
we have two functions okay so in one function uh two functions in different
21:30
function uh two functions in different
21:30
function uh two functions in different class okay so I write something like uh
21:34
class okay so I write something like uh
21:34
class okay so I write something like uh Class A okay this class A has um like
21:39
Class A okay this class A has um like
21:39
Class A okay this class A has um like two variables okay like int a okay maybe
21:44
two variables okay like int a okay maybe
21:44
two variables okay like int a okay maybe like they should be properties but uh
21:46
like they should be properties but uh
21:46
like they should be properties but uh I'm just like uh for to save time I'm
21:48
I'm just like uh for to save time I'm
21:48
I'm just like uh for to save time I'm just writing it this way public
21:51
just writing it this way public
21:52
just writing it this way public in public in uh B okay then I have one
21:57
in public in uh B okay then I have one
21:57
in public in uh B okay then I have one more class
22:01
then I have one more
22:03
then I have one more
22:03
then I have one more class so in this class I have a
22:09
function I have a
22:11
function I have a
22:11
function I have a function so this function what it will
22:13
function so this function what it will
22:13
function so this function what it will do
22:15
do
22:15
do is maybe something like
22:18
is maybe something like
22:18
is maybe something like public int like maybe
22:22
public int like maybe
22:22
public int like maybe funk I will take a of a you understand
22:27
funk I will take a of a you understand
22:27
funk I will take a of a you understand this right uh H sorry this will be a of
22:33
this right uh H sorry this will be a of
22:33
this right uh H sorry this will be a of a
22:35
a
22:35
a and and and I have my regular business
22:38
and and and I have my regular business
22:38
and and and I have my regular business code here so what I'm doing is I'm
22:40
code here so what I'm doing is I'm
22:40
code here so what I'm doing is I'm trying to couple this class say in this
22:42
trying to couple this class say in this
22:42
trying to couple this class say in this okay so in this uh function so like uh I
22:46
okay so in this uh function so like uh I
22:46
okay so in this uh function so like uh I have this class A this uh a object is
22:49
have this class A this uh a object is
22:49
have this class A this uh a object is passed here so we are introducing some
22:51
passed here so we are introducing some
22:51
passed here so we are introducing some kind of a coupling out here so and this
22:54
kind of a coupling out here so and this
22:54
kind of a coupling out here so and this adds to complexity because if if there
22:56
adds to complexity because if if there
22:56
adds to complexity because if if there are if if there are like if if something
22:59
are if if there are like if if something
22:59
are if if there are like if if something breaks here okay if something breaks
23:02
breaks here okay if something breaks
23:02
breaks here okay if something breaks here in a okay then the same thing it
23:04
here in a okay then the same thing it
23:04
here in a okay then the same thing it will have an impact on function and it
23:06
will have an impact on function and it
23:06
will have an impact on function and it will break here okay so like if you go
23:11
will break here okay so like if you go
23:11
will break here okay so like if you go by that so this also adds to like code
23:15
by that so this also adds to like code
23:15
by that so this also adds to like code complexity okay so this is the class
23:17
complexity okay so this is the class
23:17
complexity okay so this is the class compling impact so in another class we
23:19
compling impact so in another class we
23:19
compling impact so in another class we are using another class that has a
23:21
are using another class that has a
23:21
are using another class that has a function and that function takes uh like
23:25
function and that function takes uh like
23:25
function and that function takes uh like a class variable and that class variable
23:27
a class variable and that class variable
23:27
a class variable and that class variable like if there are any changes in the
23:28
like if there are any changes in the
23:28
like if there are any changes in the class that can actually have some uh
23:31
class that can actually have some uh
23:31
class that can actually have some uh like impact on the code the very next uh
23:35
like impact on the code the very next uh
23:35
like impact on the code the very next uh code quality metrics is the number of
23:37
code quality metrics is the number of
23:37
code quality metrics is the number of lines of source code you have okay it
23:40
lines of source code you have okay it
23:40
lines of source code you have okay it can also include a blank lines so
23:42
can also include a blank lines so
23:42
can also include a blank lines so whenever you're calculating the number
23:44
whenever you're calculating the number
23:44
whenever you're calculating the number of source code because more the bulky
23:46
of source code because more the bulky
23:46
of source code because more the bulky your program is more is the chance that
23:48
your program is more is the chance that
23:49
your program is more is the chance that you can introduce an error okay so if
23:51
you can introduce an error okay so if
23:51
you can introduce an error okay so if the total number of lines in a program
23:53
the total number of lines in a program
23:53
the total number of lines in a program like is uh some like x amount so your it
23:58
like is uh some like x amount so your it
23:58
like is uh some like x amount so your it it it's like proportionately your code
24:00
it it's like proportionately your code
24:00
it it's like proportionately your code is complex by x amount okay then the
24:03
is complex by x amount okay then the
24:03
is complex by x amount okay then the lines of executable code that means the
24:06
lines of executable code that means the
24:06
lines of executable code that means the number of codes that are ex actually
24:08
number of codes that are ex actually
24:08
number of codes that are ex actually executing okay it can also include the
24:10
executing okay it can also include the
24:10
executing okay it can also include the blank lines when your control flow is
24:12
blank lines when your control flow is
24:12
blank lines when your control flow is traversing through your code base it's a
24:14
traversing through your code base it's a
24:14
traversing through your code base it's a number of operations that is actually
24:17
number of operations that is actually
24:17
number of operations that is actually there in that uh code
24:19
there in that uh code
24:19
there in that uh code base then few more metrics that I will
24:23
base then few more metrics that I will
24:23
base then few more metrics that I will call it out duplicate code so when we
24:25
call it out duplicate code so when we
24:25
call it out duplicate code so when we write any code like uh it's a
24:27
write any code like uh it's a
24:27
write any code like uh it's a maintainability issue actually so when
24:30
maintainability issue actually so when
24:30
maintainability issue actually so when you write any code you tend to like what
24:32
you write any code you tend to like what
24:32
you write any code you tend to like what to do is like uh
24:35
to do is like uh
24:35
to do is like uh you do write some duplicate code like we
24:38
you do write some duplicate code like we
24:38
you do write some duplicate code like we keep repeating the code again and again
24:40
keep repeating the code again and again
24:40
keep repeating the code again and again okay instead like we should create a
24:41
okay instead like we should create a
24:41
okay instead like we should create a function have all those code there and
24:43
function have all those code there and
24:43
function have all those code there and call the function from different places
24:45
call the function from different places
24:45
call the function from different places okay that will reduce the code
24:46
okay that will reduce the code
24:47
okay that will reduce the code duplication
24:48
duplication
24:48
duplication percentage then is the code test
24:50
percentage then is the code test
24:50
percentage then is the code test coverage okay but again code duplication
24:53
coverage okay but again code duplication
24:53
coverage okay but again code duplication percent is something that you won't be
24:54
percent is something that you won't be
24:54
percent is something that you won't be able to measure using your uh Visual
24:56
able to measure using your uh Visual
24:56
able to measure using your uh Visual Studio or vs code you like but ID is
24:59
Studio or vs code you like but ID is
24:59
Studio or vs code you like but ID is like idea webstorm uh int intellig ID
25:03
like idea webstorm uh int intellig ID
25:03
like idea webstorm uh int intellig ID and webstorm they can actually help you
25:05
and webstorm they can actually help you
25:05
and webstorm they can actually help you detect this and code cover test coverage
25:08
detect this and code cover test coverage
25:08
detect this and code cover test coverage is a very important parameter so I can
25:10
is a very important parameter so I can
25:10
is a very important parameter so I can give a nice example I'll come to that
25:12
give a nice example I'll come to that
25:12
give a nice example I'll come to that what it means uh so like uh when I
25:15
what it means uh so like uh when I
25:15
what it means uh so like uh when I started my career so like uh in
25:18
started my career so like uh in
25:18
started my career so like uh in Microsoft like uh we used to like uh
25:21
Microsoft like uh we used to like uh
25:21
Microsoft like uh we used to like uh test uh Windows operating system so we
25:23
test uh Windows operating system so we
25:23
test uh Windows operating system so we used to fix code there and uh test the
25:25
used to fix code there and uh test the
25:25
used to fix code there and uh test the Windows XP so we used to to release a
25:29
Windows XP so we used to to release a
25:29
Windows XP so we used to to release a code coverage percentage
25:32
code coverage percentage
25:32
code coverage percentage there mostly I won't call out the
25:34
there mostly I won't call out the
25:34
there mostly I won't call out the numbers but based on the percentage you
25:37
numbers but based on the percentage you
25:37
numbers but based on the percentage you choose whether to release the product or
25:39
choose whether to release the product or
25:39
choose whether to release the product or not because if the code coverage
25:42
not because if the code coverage
25:42
not because if the code coverage percentage is for example 40% the
25:45
percentage is for example 40% the
25:45
percentage is for example 40% the testing is fairly good enough your test
25:48
testing is fairly good enough your test
25:48
testing is fairly good enough your test has tested at least 40% of the code base
25:51
has tested at least 40% of the code base
25:51
has tested at least 40% of the code base whatever test cases automatic test cases
25:53
whatever test cases automatic test cases
25:53
whatever test cases automatic test cases you have executed it has touched upon
25:55
you have executed it has touched upon
25:55
you have executed it has touched upon 40% of the code base okay now
25:59
40% of the code base okay now
25:59
40% of the code base okay now uh like uh uh suppose you have a code
26:02
uh like uh uh suppose you have a code
26:02
uh like uh uh suppose you have a code test coverage of 70% it's very difficult
26:05
test coverage of 70% it's very difficult
26:05
test coverage of 70% it's very difficult to reach a code test coverage of 70%
26:07
to reach a code test coverage of 70%
26:07
to reach a code test coverage of 70% like on the grounds like uh so it's if
26:11
like on the grounds like uh so it's if
26:11
like on the grounds like uh so it's if 70% then the code is very good whatever
26:13
70% then the code is very good whatever
26:13
70% then the code is very good whatever test cases automated test cases you have
26:15
test cases automated test cases you have
26:15
test cases automated test cases you have designed it has touched upon uh like the
26:17
designed it has touched upon uh like the
26:17
designed it has touched upon uh like the entire code base then a very modern kind
26:20
entire code base then a very modern kind
26:20
entire code base then a very modern kind of thing it has very recently it has
26:22
of thing it has very recently it has
26:22
of thing it has very recently it has sced up like codes Smiles okay that is
26:25
sced up like codes Smiles okay that is
26:25
sced up like codes Smiles okay that is use of depricated apas normally we do it
26:27
use of depricated apas normally we do it
26:27
use of depricated apas normally we do it right we write a code
26:28
right we write a code
26:28
right we write a code we write some apis and tomorrow we tend
26:31
we write some apis and tomorrow we tend
26:31
we write some apis and tomorrow we tend to forget it and it again Pops Pops out
26:35
to forget it and it again Pops Pops out
26:35
to forget it and it again Pops Pops out and haunts us back as uh deprecated apis
26:39
and haunts us back as uh deprecated apis
26:39
and haunts us back as uh deprecated apis okay this code should be regularly
26:40
okay this code should be regularly
26:40
okay this code should be regularly audited and upgraded so normally so you
26:43
audited and upgraded so normally so you
26:43
audited and upgraded so normally so you should check for the deprecated apas you
26:45
should check for the deprecated apas you
26:45
should check for the deprecated apas you should be regularly auditing the code if
26:48
should be regularly auditing the code if
26:48
should be regularly auditing the code if there are any deprecated apas you need
26:50
there are any deprecated apas you need
26:50
there are any deprecated apas you need to take the necessary action either
26:52
to take the necessary action either
26:52
to take the necessary action either upgrade it or like go for the next
26:54
upgrade it or like go for the next
26:54
upgrade it or like go for the next alternative substitute you have okay so
26:58
alternative substitute you have okay so
26:58
alternative substitute you have okay so these are few of the metrics that uh uh
27:01
these are few of the metrics that uh uh
27:01
these are few of the metrics that uh uh I had thought of so I would present one
27:04
I had thought of so I would present one
27:04
I had thought of so I would present one is Hall State cyclomatic maintainability
27:06
is Hall State cyclomatic maintainability
27:06
is Hall State cyclomatic maintainability index depth of inheritance class
27:08
index depth of inheritance class
27:08
index depth of inheritance class coupling lines of source code number of
27:10
coupling lines of source code number of
27:10
coupling lines of source code number of executable code code duplication test
27:12
executable code code duplication test
27:13
executable code code duplication test coverage and code smells so these are
27:14
coverage and code smells so these are
27:14
coverage and code smells so these are few of the important ones that I covered
27:16
few of the important ones that I covered
27:16
few of the important ones that I covered but uh trust me these are just uh maybe
27:19
but uh trust me these are just uh maybe
27:19
but uh trust me these are just uh maybe few of the metrics that you can think of
27:22
few of the metrics that you can think of
27:22
few of the metrics that you can think of there are lot of other metrics as well
27:24
there are lot of other metrics as well
27:24
there are lot of other metrics as well like lot of more and more metrics so you
27:27
like lot of more and more metrics so you
27:27
like lot of more and more metrics so you can think of and more you make your code
27:31
can think of and more you make your code
27:31
can think of and more you make your code measurable the quality of code
27:33
measurable the quality of code
27:33
measurable the quality of code measurable if you're able to quantify
27:35
measurable if you're able to quantify
27:35
measurable if you're able to quantify the quality of code then half of your
27:37
the quality of code then half of your
27:37
the quality of code then half of your journey is W actually in in producing a
27:41
journey is W actually in in producing a
27:41
journey is W actually in in producing a good project okay and what are the
27:44
good project okay and what are the
27:44
good project okay and what are the different tools that uh can help us in
27:47
different tools that uh can help us in
27:47
different tools that uh can help us in doing code quality metrics few these are
27:49
doing code quality metrics few these are
27:49
doing code quality metrics few these are this is a very comprehensive list at
27:52
this is a very comprehensive list at
27:52
this is a very comprehensive list at least the ones that I have used and I
27:54
least the ones that I have used and I
27:54
least the ones that I have used and I have seen but uh you'll find lot of good
27:57
have seen but uh you'll find lot of good
27:57
have seen but uh you'll find lot of good Tools around
27:58
Tools around
27:58
Tools around like uh I could think of Visual Studio
28:00
like uh I could think of Visual Studio
28:00
like uh I could think of Visual Studio vs code
28:02
vs code
28:02
vs code intellig sonar Cube sonar cube is very
28:04
intellig sonar Cube sonar cube is very
28:04
intellig sonar Cube sonar cube is very popularly used dip scan like if you're a
28:07
popularly used dip scan like if you're a
28:07
popularly used dip scan like if you're a JavaScript and a typescript you write
28:09
JavaScript and a typescript you write
28:09
JavaScript and a typescript you write lot of a lot of angular program you
28:11
lot of a lot of angular program you
28:11
lot of a lot of angular program you should consider doing a dip scan okay so
28:15
should consider doing a dip scan okay so
28:15
should consider doing a dip scan okay so with this
28:16
with this
28:16
with this background uh like let me do like it's
28:18
background uh like let me do like it's
28:18
background uh like let me do like it's all or else it will look all Theory so I
28:21
all or else it will look all Theory so I
28:21
all or else it will look all Theory so I thought like let me do some Visual
28:23
thought like let me do some Visual
28:23
thought like let me do some Visual Studio activity so I will show you in
28:25
Studio activity so I will show you in
28:25
Studio activity so I will show you in Visual Studio how you can actually
28:26
Visual Studio how you can actually
28:26
Visual Studio how you can actually analyze the code it's very very
28:28
analyze the code it's very very
28:28
analyze the code it's very very easy so here I have a project okay I
28:32
easy so here I have a project okay I
28:32
easy so here I have a project okay I have a project so like uh it's my
28:35
have a project so like uh it's my
28:35
have a project so like uh it's my personal development that I'm like
28:37
personal development that I'm like
28:37
personal development that I'm like building some some stuff okay so it
28:41
building some some stuff okay so it
28:41
building some some stuff okay so it looks uh there are five projects and in
28:45
looks uh there are five projects and in
28:45
looks uh there are five projects and in DB scripts also okay it's just a script
28:47
DB scripts also okay it's just a script
28:48
DB scripts also okay it's just a script okay so like uh and for this five
28:50
okay so like uh and for this five
28:50
okay so like uh and for this five projects let me see what is the
28:52
projects let me see what is the
28:52
projects let me see what is the complexity okay let me see just for this
28:56
complexity okay let me see just for this
28:56
complexity okay let me see just for this Enterprise startup toolkit what is the
28:58
Enterprise startup toolkit what is the
28:58
Enterprise startup toolkit what is the complexity okay I can go to analyze very
29:00
complexity okay I can go to analyze very
29:00
complexity okay I can go to analyze very easy calculate code Matrix for
29:03
easy calculate code Matrix for
29:03
easy calculate code Matrix for Enterprise startup toolkit see for this
29:07
Enterprise startup toolkit see for this
29:08
Enterprise startup toolkit see for this particular project it will give me like
29:10
particular project it will give me like
29:10
particular project it will give me like uh see like uh the program okay like uh
29:14
uh see like uh the program okay like uh
29:14
uh see like uh the program okay like uh there is some specific class 404
29:15
there is some specific class 404
29:15
there is some specific class 404 requirement for this class like
29:18
requirement for this class like
29:18
requirement for this class like maintainable it's it's a highly
29:19
maintainable it's it's a highly
29:19
maintainable it's it's a highly maintainable code okay that means my
29:22
maintainable code okay that means my
29:22
maintainable code okay that means my team has done a good job then cyclomatic
29:25
team has done a good job then cyclomatic
29:25
team has done a good job then cyclomatic complexity okay so all these so this
29:28
complexity okay so all these so this
29:28
complexity okay so all these so this green is orange it will show you green
29:30
green is orange it will show you green
29:30
green is orange it will show you green Amber red okay number of lines of code
29:32
Amber red okay number of lines of code
29:33
Amber red okay number of lines of code so all these like this maintainability
29:35
so all these like this maintainability
29:35
so all these like this maintainability index I told you right it is between 0
29:36
index I told you right it is between 0
29:36
index I told you right it is between 0 to 100 so it's calculating those
29:39
to 100 so it's calculating those
29:39
to 100 so it's calculating those maintainability index one more thing you
29:41
maintainability index one more thing you
29:41
maintainability index one more thing you can do is I did it just for a single
29:43
can do is I did it just for a single
29:43
can do is I did it just for a single project what if I want to measure all
29:45
project what if I want to measure all
29:45
project what if I want to measure all the projects in my solution so how I can
29:48
the projects in my solution so how I can
29:48
the projects in my solution so how I can do is go to the analyze calculate Cod
29:51
do is go to the analyze calculate Cod
29:51
do is go to the analyze calculate Cod metrics for Enterprise startup
29:55
toolkit so wait sorry
29:59
toolkit so wait sorry
29:59
toolkit so wait sorry analyze for solution okay when you do it
30:01
analyze for solution okay when you do it
30:02
analyze for solution okay when you do it for the solution for all the project it
30:04
for the solution for all the project it
30:04
for the solution for all the project it will give you your code quality metrics
30:07
will give you your code quality metrics
30:07
will give you your code quality metrics okay since I've written some good code
30:10
okay since I've written some good code
30:10
okay since I've written some good code that's why I see all green if there
30:12
that's why I see all green if there
30:12
that's why I see all green if there would be some issues in the code base
30:15
would be some issues in the code base
30:15
would be some issues in the code base it's it's a pretty much of a real-time
30:16
it's it's a pretty much of a real-time
30:16
it's it's a pretty much of a real-time project actually to be very honest that
30:18
project actually to be very honest that
30:18
project actually to be very honest that I'm building so like uh you can see this
30:22
I'm building so like uh you can see this
30:22
I'm building so like uh you can see this okay so it's very simple analyze
30:25
okay so it's very simple analyze
30:25
okay so it's very simple analyze calculate code Matrix and you are sorted
30:28
calculate code Matrix and you are sorted
30:28
calculate code Matrix and you are sorted and you should keep track of this daily
30:29
and you should keep track of this daily
30:29
and you should keep track of this daily to see that you're always green here
30:32
to see that you're always green here
30:32
to see that you're always green here okay now let me come to the last part of
30:35
okay now let me come to the last part of
30:35
okay now let me come to the last part of the
30:37
the
30:37
the presentation that is the business impact
30:40
presentation that is the business impact
30:40
presentation that is the business impact okay that we can have so there are
30:42
okay that we can have so there are
30:42
okay that we can have so there are instances in industry in India as well
30:44
instances in industry in India as well
30:44
instances in industry in India as well as abroad like in Us in uh Europe like U
30:48
as abroad like in Us in uh Europe like U
30:48
as abroad like in Us in uh Europe like U where we have written bad quality code
30:51
where we have written bad quality code
30:51
where we have written bad quality code and like uh there are a lot of uh uh
30:56
and like uh there are a lot of uh uh
30:56
and like uh there are a lot of uh uh like legal tassels and all that has
30:59
like legal tassels and all that has
30:59
like legal tassels and all that has happened you you read this like uh this
31:01
happened you you read this like uh this
31:01
happened you you read this like uh this is from the CIO dive okay it's a CIO
31:04
is from the CIO dive okay it's a CIO
31:04
is from the CIO dive okay it's a CIO dive magazine so it's a exerpt from
31:07
dive magazine so it's a exerpt from
31:07
dive magazine so it's a exerpt from there so and this is the link I like a
31:10
there so and this is the link I like a
31:10
there so and this is the link I like a link for uh the CIO drive from where I
31:14
link for uh the CIO drive from where I
31:14
link for uh the CIO drive from where I have taken it so you can read here poor
31:16
have taken it so you can read here poor
31:16
have taken it so you can read here poor software quality cost organizations
31:17
software quality cost organizations
31:17
software quality cost organizations across all us sectors okay this is like
31:20
across all us sectors okay this is like
31:21
across all us sectors okay this is like it includes like uh uh both like uh the
31:25
it includes like uh uh both like uh the
31:25
it includes like uh uh both like uh the customers who have taken poor quality
31:28
customers who have taken poor quality
31:28
customers who have taken poor quality code they have lost 2.08 trillion in
31:31
code they have lost 2.08 trillion in
31:31
code they have lost 2.08 trillion in 2020 and also includes the integrators
31:35
2020 and also includes the integrators
31:35
2020 and also includes the integrators or like the develop the uh
31:37
or like the develop the uh
31:37
or like the develop the uh application uh Builders or the
31:40
application uh Builders or the
31:40
application uh Builders or the developers who have delivered so like uh
31:43
developers who have delivered so like uh
31:43
developers who have delivered so like uh this is the number like collectively
31:45
this is the number like collectively
31:45
this is the number like collectively they have
31:46
they have
31:46
they have lost and uh also like the operational
31:48
lost and uh also like the operational
31:49
lost and uh also like the operational software
31:50
software
31:50
software failures okay like uh is the leading
31:54
failures okay like uh is the leading
31:54
failures okay like uh is the leading driver of cost okay if there are how
31:56
driver of cost okay if there are how
31:56
driver of cost okay if there are how will you get soft after failure when you
31:58
will you get soft after failure when you
31:59
will you get soft after failure when you have not written the right code okay
32:01
have not written the right code okay
32:01
have not written the right code okay your code has bugs your code have
32:03
your code has bugs your code have
32:03
your code has bugs your code have defects when your code will have defect
32:05
defects when your code will have defect
32:05
defects when your code will have defect it will introduce uh software
32:08
it will introduce uh software
32:08
it will introduce uh software failures okay cost estimates for
32:10
failures okay cost estimates for
32:10
failures okay cost estimates for operational software failures may fall
32:12
operational software failures may fall
32:12
operational software failures may fall short in context of a Serge in cyber
32:14
short in context of a Serge in cyber
32:14
short in context of a Serge in cyber security failures as well so it's
32:16
security failures as well so it's
32:16
security failures as well so it's dangerous so you include cyber security
32:18
dangerous so you include cyber security
32:18
dangerous so you include cyber security risk I I I did not name intentionally
32:22
risk I I I did not name intentionally
32:22
risk I I I did not name intentionally any of the companies but if you'll
32:23
any of the companies but if you'll
32:23
any of the companies but if you'll Google around you can find lot of
32:24
Google around you can find lot of
32:25
Google around you can find lot of companies like uh who have actually
32:27
companies like uh who have actually
32:27
companies like uh who have actually suffered because of bad quality from
32:28
suffered because of bad quality from
32:28
suffered because of bad quality from both the sides of the table so may be
32:31
both the sides of the table so may be
32:31
both the sides of the table so may be from uh like on uh the pretext of a
32:34
from uh like on uh the pretext of a
32:34
from uh like on uh the pretext of a customer or consumer of the code or the
32:36
customer or consumer of the code or the
32:36
customer or consumer of the code or the developer of the code okay
32:43
[Music]