Re^3: Precompiling substitution regex

Well, you could of course store an array of closures that each does a substitution, and call those in turn - but it might slow down things again. Or you could store regexes and substitutions in the same array, but distinguished by different indexes (even/odd or first half/second half).

But I don't think you can easily store a precompiled whole substitution in a single scalar.

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Comment on Re^3: Precompiling substitution regex

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Re^4: Precompiling substitution regex by AnomalousMonk (Archbishop) on Jun 17, 2011 at 18:11 UTC
... store regexes and substitutions in the same array, but distinguished by different indexes ... An example of what I think moritz is referring to (and the way I think I would approach the problem): `>perl -wMstrict -le "my @subs = ( [ qr{ (?i) foo \| bar }xms => 'quux' ], [ qr{ fee \| fie \| foe }xms => 'fum' ], ); ;; my $string = 'foo fee BAR foe fOo fie FOE'; for my $ar_sub (@subs) { my ($search, $replace) = @$ar_sub; $string =~ s{$search}{$replace}g; } print qq{'$string'}; " 'quux fum quux fum quux fum FOE'` [download] Note that regex modifiers like /g cannot be associated with each individual regex using this approach; something a little more fancy is needed for that.	[reply] [d/l]

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Re^4: Precompiling substitution regex
by AnomalousMonk (Archbishop) on Jun 17, 2011 at 18:11 UTC

... store regexes and substitutions in the same array, but distinguished by different indexes ...

An example of what I think moritz is referring to (and the way I think I would approach the problem):

>perl -wMstrict -le
"my @subs = (
   [ qr{ (?i)  foo | bar }xms => 'quux' ],
   [ qr{ fee | fie | foe }xms => 'fum'  ],
   );
 ;;
 my $string = 'foo fee BAR foe fOo fie FOE';
 for my $ar_sub (@subs) {
   my ($search, $replace) = @$ar_sub;
   $string =~ s{$search}{$replace}g;
   }
 print qq{'$string'};
"
'quux fum quux fum quux fum FOE'
[download]

Note that regex modifiers like /g cannot be associated with each individual regex using this approach; something a little more fancy is needed for that.

[reply]
[d/l]