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Subroutines in a regex?

by heidkamp (Initiate)
on Apr 04, 2001 at 19:04 UTC ( #69688=categorized question: print w/replies, xml ) Need Help??
Contributed by heidkamp on Apr 04, 2001 at 19:04 UTC
Q&A  > regular expressions


Description:

I want to replace text with the results of a subroutine, ie
s/SUM(\d*)/sum($1)/g sub sum()
using (?{CODE}) is 0 width (no replacement), and I can't get it to work in the replacement section anyway.
Any ideas?

Answer: Subroutines in a regex?
contributed by busunsl

use

s/SUM(\d*)/sum($1)/eg
this will execute the subroutine.
Answer: Subroutines in a regex?
contributed by alfie

busunsl is right, but I'd like to add another feature and DWIM[1] to your code:

s/(SUM(\d*))/&sum($2)/eg
For I think you want to have the SUM characters stripped off, don't you?

[1] Do What I Mean
--
Alfie

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