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Re^2: RegEx related line split

by johngg (Abbot)
on Nov 14, 2011 at 10:27 UTC ( #937913=note: print w/ replies, xml ) Need Help??


in reply to Re: RegEx related line split
in thread RegEx related line split

Do you mean that the opening parenthesis is optional in the text you are spliting? If so, you can use a '?' quantifier to make the opening parenthesis "zero or one of" but you also have to use a negative look behind to make sure you don't split '(' from 'a)'. I've added the 'x' modifier to the pattern so I can space it out and make it more readable.

knoppix@Microknoppix:~$ perl -E ' > $line = q{(a) Line 1. b) Line 2. (c) Line 32. d) Line 42.}; > @arr = split m{ (?<! \( ) (?= \(? [a-z] \) ) }x, $line; > say qq{>$_<} for @arr;' >(a) Line 1. < >b) Line 2. < >(c) Line 32. < >d) Line 42.< knoppix@Microknoppix:~$

I hope this is helpful.

Update: Oops, looks like I replied to myself rather than the OP's subsequent question. Please ignore this and consider my reply to him.

Cheers,

JohnGG


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Re^3: RegEx related line split
by Gavin (Canon) on Nov 14, 2011 at 10:41 UTC

    Alas a senior moment, it happens to all old coders.

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