# Re: Search an array

**URL:** <https://www.ruby-forum.com/t/re-search-an-array/94816>\
**Category:** Ruby\
**Created:** [May 15, 2006, 6:20pm UTC](https://www.ruby-forum.com/t/re-search-an-array/94816 "2006-05-15T18:20:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![BergerS\_Daniel](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bc8723/32.png) [@BergerS\_Daniel](https://www.ruby-forum.com/u/BergerS_Daniel)\
**Post date:** [May 15, 2006, 6:20pm UTC](https://www.ruby-forum.com/t/re-search-an-array/94816/1 "2006-05-15T18:20:24Z")

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> the currently running program; $0? The idea is to log all the  
> errors to  
> a SQL Server database, the name of the program, line number where the  
> error occurred, error message, etc.
> 
> Thanks!

Why look in $@? You already know what $0 is.

Also, it might be easier to use a library like ‘tracer’ (stdlib) or  
perhaps ruby-trace (RAA).

In other other random thoughts, ruby-trace looks like a prime candidate  
for a rewrite using a DSL. 🙂

Regards,

Dan

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<div class="post-metadata">

**Author:** ![BergerS\_Daniel](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bc8723/32.png) [@BergerS\_Daniel](https://www.ruby-forum.com/u/BergerS_Daniel)\
**Post date:** [May 15, 2006, 10:29pm UTC](https://www.ruby-forum.com/t/re-search-an-array/94816/2 "2006-05-15T22:29:59Z")

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2006/5/15, Berger, Daniel [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> > the currently running program; $0? The idea is to log all the  
> > errors to  
> > a SQL Server database, the name of the program, line number where the  
> > error occurred, error message, etc.
> > 
> > Thanks!
> 
> Why look in $@? You already know what $0 is.

He needs to find the entry with the name to get the line number.  
Here’s another nice solution:

prog = “C:/mhiqTest/testAdoConnection.rb”

stack = [  
“c:/ruby/lib/ruby/site\_ruby/1.8/DBD/ADO/ADO.rb:57:in `connect’”,  
“c:/ruby/lib/ruby/site\_ruby/1.8/dbi.rb:424:in `connect’”,  
“c:/ruby/lib/ruby/site\_ruby/1.8/dbi.rb:215:in `connect’”,  
“C:/mhiqTest/testAdoConnection.rb:16”,  
]

rx = Regexp.new(Regexp.escape(prog) + “:(\d+)”)  
stack.inject(nil) {|nr, frame| rx =~ frame ? $1.to\_i : nr }

:-))

Kind regards

robert