Script_lines__

Ruby
1

If the constant SCRIPT_LINES__ is defined and holds a hash, for each
file
loaded after the constant definition the hash gets an entry that maps
the
file name to an array of strings: the file lines.

Does anybody have a use case for this constant, or know the rationale
behind this feature?

2

Hi,

You can use this for debugging. If you extract the file name and line
number from the stracktrace of an error, you can print out the actual
line from SCRIPT_LINES__.

3

Unsubscribe Tombari Biranen
Sent from my BlackBerry wireless device from MTN

4

Xavier N. wrote in post #1052200:

Is that an idea or do you mean Ruby debuggers do use that constant?

I don’t know which programs actually use the constant. But does it even
matter? You can use it for whatever you want. :wink:

Anyway, this usecase is described in the Ruby book by Flanagan and
Matsumoto.

5

On Sun, Mar 18, 2012 at 10:13 PM, Jan E. [email protected] wrote:

You can use this for debugging. If you extract the file name and line

number from the stracktrace of an error, you can print out the actual
line from SCRIPT_LINES__.

Is that an idea or do you mean Ruby debuggers do use that constant?

6

Yes, they do use it. Also test coverage programs appear to use it.

7

On Sun, Mar 18, 2012 at 10:57 PM, Jan E. [email protected] wrote:

Hi Jan, thanks for your reply.

Xavier N. wrote in post #1052200:

Is that an idea or do you mean Ruby debuggers do use that constant?

I don’t know which programs actually use the constant. But does it even
matter?

I wonder about real use cases.