Slightly tangental but just for edification's sake: there's also @+ and @- which store offsets into the string and the documentation for the later gives examples to translate a match variable $n into a corresponding substr($str, $-[n], $+[n]-$-[n]) call.

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: array of strings that matched a pattern by Fletch
in thread array of strings that matched a pattern by Anonymous Monk

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