Counting lines of code in a ruby code file ignoring method code lines in the process

ruby-talk
1

Hello,

I am re-posting this in case it did not make it when I posted it earlier:

Hello,

I am writing a Ruby program that reads a ruby code file and counts the
number of lines of code that are in the file. I do not want to count
the number of lines of code in any methods that may be in the file. I can
look for a line of code that begins with 'def' and I know that the method
will have an 'end' on the last line, but I am trying to figure out how to
not get the 'end' confused with other 'end's that may be inside the method
itself, like 'end's associated with if statements and case statements as an
example.

I was thinking that once I see a 'def' starting a code line I would know
that I am reading in a method, so I would increment an 'end' counter
by 1. I would also increment the end counter each time I read a 'case' or an
'if', or any other expression that required it's own 'end'. Each time I
would read an 'end' I would decrement the 'end' counter, and when it equals
zero, I would know that I read in the entire method, then I could start
counting code lines again.

Any ideas would be greatly appreciated.

Thanks!

Harry Truax

···

--
Harry Truax
Phone: 315.463.8506
Email: htruax@stf.com
26 Corporate Circle
East Syracuse, NY 13057

2

Well this could be a bit of a cheat but you could put the code through
a formatter which will indent the code to the same level and then when
you encounter a 'def' with x leading spaces you know that the paired
'end' should also have x leading spaces (and be on a line by itself).

Seems to be cheating but would probably work.

3

But, I think it is not so simple.
How would you count the lines in this code?
2 or 4?
There is 1 def.
There are 3 ifs.
There are 2 ends.

class Array
  def silly(num)
    result = "small" if self[num] < 100
    result = "medium" if self[num] > 100
    result = "large" if self[0] == 1
    result
  end
end

arr = [1,2,3,4,5,6,7]
p arr.silly(3)

Harry

···

On Wed, Jul 27, 2011 at 11:51 PM, Harry Truax <htruax@stf.com> wrote:

Hello,

I am re-posting this in case it did not make it when I posted it earlier:

Hello,

I am writing a Ruby program that reads a ruby code file and counts the
number of lines of code that are in the file. I do not want to count
the number of lines of code in any methods that may be in the file. I can
look for a line of code that begins with 'def' and I know that the method
will have an 'end' on the last line, but I am trying to figure out how to
not get the 'end' confused with other 'end's that may be inside the method
itself, like 'end's associated with if statements and case statements as an
example.

I was thinking that once I see a 'def' starting a code line I would know
that I am reading in a method, so I would increment an 'end' counter
by 1. I would also increment the end counter each time I read a 'case' or an
'if', or any other expression that required it's own 'end'. Each time I
would read an 'end' I would decrement the 'end' counter, and when it equals
zero, I would know that I read in the entire method, then I could start
counting code lines again.

Any ideas would be greatly appreciated.

Thanks!

4

Thanks for the reply Peter. Yeah, I thought about something like that, but
there could be a method where the end is on the same line as the
corresponding statement, like

def do_this (y) x = y + 10 end

or inside the method like

if (x < y) x = y end

I also thought about looking for a code line that started with 'end' and
using that to conclude that the method was finished, but someone could have
mistakenly typed a space char in fron t of it when writing it.

Appreciate your help!

Harry

···

On Wed, Jul 27, 2011 at 11:04 AM, Peter Hickman < peterhickman386@googlemail.com> wrote:

Well this could be a bit of a cheat but you could put the code through
a formatter which will indent the code to the same level and then when
you encounter a 'def' with x leading spaces you know that the paired
'end' should also have x leading spaces (and be on a line by itself).

Seems to be cheating but would probably work.

--
Harry Truax
Phone: 315.463.8506
Email: htruax@stf.com
26 Corporate Circle
East Syracuse, NY 13057

5

Thanks for the reply Peter. Yeah, I thought about something like that, but
there could be a method where the end is on the same line as the
corresponding statement, like

def do_this (y) x = y + 10 end

or inside the method like

if (x < y) x = y end

I also thought about looking for a code line that started with 'end' and
using that to conclude that the method was finished, but someone could have
mistakenly typed a space char in fron t of it when writing it.

Appreciate your help!

Harry

···

On Wed, Jul 27, 2011 at 11:04 AM, Peter Hickman < peterhickman386@googlemail.com> wrote:

Well this could be a bit of a cheat but you could put the code through
a formatter which will indent the code to the same level and then when
you encounter a 'def' with x leading spaces you know that the paired
'end' should also have x leading spaces (and be on a line by itself).

Seems to be cheating but would probably work.

--
Harry Truax
Phone: 315.463.8506
Email: htruax@stf.com
26 Corporate Circle
East Syracuse, NY 13057

6

As I understood from the requirements, that would be 2, since the rest
of the code is inside class or def. So I thought about using
ruby_parser, removing the toplevel sexps that were :class or :defn,
but then I still don't know how to count the lines in the rest of
them.

Jesus.

···

On Thu, Jul 28, 2011 at 12:15 PM, Harry Kakueki <list.push@gmail.com> wrote:

On Wed, Jul 27, 2011 at 11:51 PM, Harry Truax <htruax@stf.com> wrote:

Hello,

I am re-posting this in case it did not make it when I posted it earlier:

Hello,

I am writing a Ruby program that reads a ruby code file and counts the
number of lines of code that are in the file. I do not want to count
the number of lines of code in any methods that may be in the file. I can
look for a line of code that begins with 'def' and I know that the method
will have an 'end' on the last line, but I am trying to figure out how to
not get the 'end' confused with other 'end's that may be inside the method
itself, like 'end's associated with if statements and case statements as an
example.

I was thinking that once I see a 'def' starting a code line I would know
that I am reading in a method, so I would increment an 'end' counter
by 1. I would also increment the end counter each time I read a 'case' or an
'if', or any other expression that required it's own 'end'. Each time I
would read an 'end' I would decrement the 'end' counter, and when it equals
zero, I would know that I read in the entire method, then I could start
counting code lines again.

Any ideas would be greatly appreciated.

Thanks!

But, I think it is not so simple.
How would you count the lines in this code?
2 or 4?
There is 1 def.
There are 3 ifs.
There are 2 ends.

class Array
def silly(num)
result = "small" if self[num] < 100
result = "medium" if self[num] > 100
result = "large" if self[0] == 1
result
end
end

arr = [1,2,3,4,5,6,7]
p arr.silly(3)

7

Maybe you could take a look at ruby_parser or parse_tree. I currently
don't know how to implement your requirement with them, but I guess it
should be possible.

Jesus.

···

On Wed, Jul 27, 2011 at 6:40 PM, Harry Truax <htruax@stf.com> wrote:

Thanks for the reply Peter. Yeah, I thought about something like that, but
there could be a method where the end is on the same line as the
corresponding statement, like

def do_this (y) x = y + 10 end

or inside the method like

if (x < y) x = y end

I also thought about looking for a code line that started with 'end' and
using that to conclude that the method was finished, but someone could have
mistakenly typed a space char in fron t of it when writing it.

Appreciate your help!

8

Thanks Jesus, I will take a look.

···

2011/7/27 Jesús Gabriel y Galán <jgabrielygalan@gmail.com>

On Wed, Jul 27, 2011 at 6:40 PM, Harry Truax <htruax@stf.com> wrote:
> Thanks for the reply Peter. Yeah, I thought about something like that,
but
> there could be a method where the end is on the same line as the
> corresponding statement, like
>
> def do_this (y) x = y + 10 end
>
> or inside the method like
>
> if (x < y) x = y end
>
> I also thought about looking for a code line that started with 'end' and
> using that to conclude that the method was finished, but someone could
have
> mistakenly typed a space char in fron t of it when writing it.
>
> Appreciate your help!

Maybe you could take a look at ruby_parser or parse_tree. I currently
don't know how to implement your requirement with them, but I guess it
should be possible.

Jesus.

--
Harry Truax
Phone: 315.463.8506
Email: htruax@stf.com
26 Corporate Circle
East Syracuse, NY 13057