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Re: Scan of Emacs regexp mistakes
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From: |
Mattias Engdegård |
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Subject: |
Re: Scan of Emacs regexp mistakes |
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Date: |
Thu, 16 Apr 2020 20:01:37 +0200 |
16 apr. 2020 kl. 18.08 skrev Paul Eggert <address@hidden>:
>> - (while (re-search-forward "\\([ \t]*\n[ \t]*\\)+" nil t)
>> + (while (re-search-forward "[ \t]*\\(?:\n[ \t]*\\)+" nil t)
>> (replace-match " "))
>
> Wouldn't it be better to use "[ \t]*\n[ \t\n]*"?
Superior in every way, thank you! Evidenced by disassembling them: your pattern
results in both loops being optimised, compared to only the first (of three) in
my clumsy attempt.