Re: Multiple Match (Sort of AND)

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Re^2: Multiple Match (Sort of AND) by JavaFan (Canon) on Apr 25, 2010 at 23:37 UTC
Please note that `/(PAT1.PAT2)\|(PAT2.PAT1)/` and `/PAT1/ and /PAT2/` are not equivalent. The latter will match if `PAT1` and `PAT2` can overlap, while the former will only match non-overlapping patterns. For instance, `$_ = "foof"; /(foo.oof)\|(oof.foo)/;` [download] doesn't match, but `$_ = "foof"; /foo/ and /oof/` [download] does. Note also that using multiple regexes cannot always be done. Think functions taking regexes are argument (`split`!), or patterns stored in configuration files.	[reply] [d/l] [select]

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Re^2: Multiple Match (Sort of AND)
by JavaFan (Canon) on Apr 25, 2010 at 23:37 UTC

/(PAT1.*PAT2)|(PAT2.*PAT1)/

/PAT1/ and /PAT2/

PAT1

PAT2

$_ = "foof";
/(foo.*oof)|(oof.*foo)/;
[download]

$_ = "foof";
/foo/ and /oof/
[download]

does

Note also that using multiple regexes cannot always be done. Think functions taking regexes are argument (split!), or patterns stored in configuration files.

[reply]
[d/l]
[select]