Re^2: position of first matching regex

Yup. That is an excellent goof on my part. I should be good at goofs, I've practiced all my life.

My two lessons here are that: (@- != $-[0]) && $-[0] requires /...(...).../ re positional variables.

Thank you for your reply.

David

Comment on Re^2: position of first matching regex

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Re^3: position of first matching regex by AnomalousMonk (Archbishop) on May 17, 2014 at 17:35 UTC
... $-[0] requires /...(...).../ re positional variables. You show a capturing group in your example and refer to "positional variables", so I thought I'd mention that `$-[0]` is the offset of the start of the overall match and does not depend at all on capture groups. `c:\@Work\Perl>perl -wMstrict -le "my $s = 'xxxabcyyy'; ;; print qq{overall match begining at offset $-[0] in '$s'} if $s =~ m{ abc }xms; " overall match begining at offset 3 in 'xxxabcyyy'` [download] (And BTW: I've been practicing goofs for quite a while myself.)	[reply] [d/l] [select]

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Re^3: position of first matching regex
by AnomalousMonk (Archbishop) on May 17, 2014 at 17:35 UTC

... $-[0] requires /...(...).../ re positional variables.

You show a capturing group in your example and refer to "positional variables", so I thought I'd mention that $-[0] is the offset of the start of the overall match and does not depend at all on capture groups.

c:\@Work\Perl>perl -wMstrict -le
"my $s = 'xxxabcyyy';
 ;;
 print qq{overall match begining at offset $-[0] in '$s'}
   if $s =~ m{ abc }xms;
"
overall match begining at offset 3 in 'xxxabcyyy'
[download]

(And BTW: I've been practicing goofs for quite a while myself.)

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