How do I find $a only where it's not followed by $b and then replace it with $c?


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How do I find $a only where it's not followed by $b and then replace it with $c?

by vroom (His Eminence)

on Feb 01, 2000 at 23:41 UTC ( [id://2662]=perlquestion: print w/replies, xml )

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vroom has asked for the wisdom of the Perl Monks concerning the following question:

How do I find $a only where it's not followed by $b and then replace it with $c?

Originally posted as a Categorized Question.

Comment on How do I find $a only where it's not followed by $b and then replace it with $c?

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Re: How do I find $a only where it's not followed by $b and then replace it with $c? by neshura (Chaplain) on Feb 15, 2000 at 03:19 UTC
Use Perl's cool "zero-width negative lookahead assertion". `s/$a(?!$b)/$c/;`	[reply]
Re: How do I find $a only where it's not followed by $b and then replace it with $c? by cored (Scribe) on Oct 09, 2002 at 00:41 UTC
`s/$a[^$b]/$c/;` Originally posted as a Categorized Answer.	[reply] [d/l]

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