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Re^2: Uer Perl Variable in file

by moritz (Cardinal)
on Aug 06, 2012 at 13:59 UTC ( #985727=note: print w/ replies, xml ) Need Help??


in reply to Re: Uer Perl Variable in file
in thread Uer Perl Variable in txt file

Or even

#!/usr/bin/perl use warnings; use strict; my %replace = (name => 'Joe', fun => 'a game'); my $search_for = join '|', map quotemeta, keys %replace; while (<DATA>) { s/\$($search_for)/$replace{$1}/g; print; }

I avoid nested loops where possible.


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Re^3: Uer Perl Variable in file
by tinita (Parson) on Aug 06, 2012 at 14:24 UTC
    my $search_for = join '|', map quotemeta, keys %replace; ... s/\$($search_for)/$replace{$1}/g;
    Additionally:
    when doing things like this and you have two hash keys "foo" and "foobar", either use \b in the regex if possible, or sort the hash keys for length before joining. otherwise $foobar could be replaced with the value of $replace{foo}.
    s/\$($search_for)\b/$replace{$1}/g;

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