From: Robert Klemme <shortcutter@...>
Date: 2006-05-16T05:27:00+09:00
Subject: Re: Search an array

2006/5/15, Berger, Daniel <Daniel.Berger@qwest.com>:
> > -----Original Message-----
> > From: list-bounce@example.com
> > [mailto:list-bounce@example.com] On Behalf Of Patrick Spence
> > Sent: Monday, May 15, 2006 9:59 AM
> > To: ruby-talk ML
> > Subject: Search an array
> >
> >
> >
> > Given the following scenario...
> >
> > $0 = "C:/mhiqTest/testAdoConnection.rb"
> >
> > $@[0] = "c:/ruby/lib/ruby/site_ruby/1.8/DBD/ADO/ADO.rb:57:in
> > `connect'" $@[1] =
> > "c:/ruby/lib/ruby/site_ruby/1.8/dbi.rb:424:in `connect'"
> > $@[2] = "c:/ruby/lib/ruby/site_ruby/1.8/dbi.rb:215:in
> > `connect'" $@[3] = "C:/mhiqTest/testAdoConnection.rb:16"
> >
> > How can I search the callstack array; $@, for the element
> > that contains
> > 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

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