RegEx problems

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: RegEx problems by sauoq (Abbot) on Jul 01, 2003 at 17:22 UTC
Can anyone tell me what I'm doing wrong? You aren't capturing or using list context. You are assigning a boolean to `$map` which answers "does this match?" Try: `my ($map) = $traps{$trap}{oid} =~ /(\d+)$/;` [download] -sauoq "My two cents aren't worth a dime.";	[reply] [d/l]
Re: RegEx problems by dws (Chancellor) on Jul 01, 2003 at 17:23 UTC
Try changing `my $map = $traps{$trap}{oid} =~ /\.\d+$/;` [download] to `my ($map) = $traps{$trap}{oid} =~ /\.(\d+)$/;` [download] The final digit of an SNMP OID has no particular significance, unless it's an index into a table. (But you probably knew that.)	[reply] [d/l] [select]
Re: RegEx problems by dreadpiratepeter (Priest) on Jul 01, 2003 at 17:25 UTC
you need to do two things. 1. create a submatch for the data you want and 2. evaluate the regexp in list context to get the result. Try: `my ($map) = $traps{$trap}{oid} =~ /\.(\d+)$/;` [download] -pete "Worry is like a rocking chair. It gives you something to do, but it doesn't get you anywhere."	[reply] [d/l]
Re: RegEx problems by ant9000 (Monk) on Jul 01, 2003 at 17:42 UTC
I'd personally prefer the syntax `my $map = $1 if($traps{$trap}{oid} =~ /\.(\d+)$/);` [download] simply because I find it more readable... just a matter of taste, really.	[reply] [d/l]
Re: RegEx problems by Not_a_Number (Prior) on Jul 01, 2003 at 17:54 UTC
Or if you don't want to use a regex: `my $map = substr $traps{$trap}{oid}, ( rindex $traps{$trap}{oid}, '.' ) + 1;` [download]	[reply] [d/l]
Re: RegEx problems by Zed_Lopez (Chaplain) on Jul 01, 2003 at 19:13 UTC
or there's `my $map = (split /\./, $traps{$trap}{oid})[-1];`	[reply] [d/l]