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Re: Problem with ampersand and regex

by frozenwithjoy (Curate)
on Dec 19, 2012 at 20:39 UTC ( #1009631=note: print w/ replies, xml ) Need Help??


in reply to Problem with ampersand and regex

Others have already answered your question, but I just wanted to point out something related to the title of your post since it could potentially cause confusion. An ampersand is '&' (the Perl sigil for subroutine), whereas '@' is called at sign, at symbol, apetail, commercial at, or even ampersat.


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Re^2: Problem with ampersand and regex
by Anonymous Monk on Dec 19, 2012 at 20:46 UTC
    You are correct and thank you for pointing that out. Unfortunately, I am still having problems though. In an attempt to make the post easy to read, I left out some of the code and that makes the answer thus far impossible as far as I can see. Here is how my code should have looked:
    foreach my $line (@array) { if ($line =~ /mail: /) { my $mail = substr($line, $+[$#+] ); print "mail=$mail\n"; } }
    With that, I see no way to use the single quotes as suggested. Any other possible solutions??

    Thank you again.

      What do you get if you capture?

      if( $line =~ /^mail:\s+([\S]+)$/ ) { my $mail = $1; print "mail=$mail\n"; }

      Dave

        I get mail=asdf.com ? ?

      The '@' isn't a problem when you read it from a file. Only if you're using it in a double-quoted string. For example:

      $ cat t.pl #!/usr/bin/perl use strict; use warnings; my @array = <DATA>; foreach my $line (@array) { if ($line =~ /mail: /) { my $mail = substr($line, $+[$#+] ); print "mail=$mail\n"; } } __DATA__ This @ should be just fine mail: this @ should also be fine $ perl t.pl mail=this @ should also be fine

      ...roboticus

      When your only tool is a hammer, all problems look like your thumb.

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