I know that TheDamian recommends character classes to escape chars in regexes (in PBP), but it's generally a bad idea because it will disable some optimizations (at least in older versions of perl, don't know about current ones).

Also \| is shorten than [|], and thus less noise that your brain has to parse.

But in the original post the | isn't escaped at all, so you're actually modifiying the behaviour of the regex.

In reply to Re^4: Sort/Uniq Help by moritz
in thread Sort/Uniq Help by learningperl01

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