in reply to Re: Re: A complex recursive regex,help
in thread A complex recursive regex,help

Sorry. I misunderstood your requirement (though it could have been stated a little more clearly:^).

This one (I think does what you want, edge case as well and is relatively simple. 

$s = "xx|xx|xxxx|xx|xxx|xx|xx|xx";
$s =~ s[(?<!x)(x)(x)(?!x)][$1 $2]g;
print $s;
x x|x x|xxxx|x x|xxx|x x|x x|x x

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Update Thinking about it, stick with tachyon's as this will fall over if your data contains any occurance of xx without |'s or x's on either side.

Examine what is said, not who speaks.

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Re: Re: Re: Re: A complex recursive regex,help
by OM_Zen (Scribe) on Feb 06, 2003 at 04:45 UTC
    Hi ,

    The cases where the xx appears last are clearly taken care of by your regex BrowserUk,the part I am not understanding is that you are saying that it will fall over if yout date containes any occurances of xx without |'s or x's on either side, please give an instance of this BrowserUk, in terms of data to facilitate the understanding as yoru regex is doing pretty good in all data strings

[reply]

      An example where mine falls over, but I think tachyon's wouldn't. 

      $t = "xyxxy|xx|xy|xx|yy|yxxy xx x"
$t =~ s[(?<!x)(x)(x)(?!x)][$1 $2]g;

print $t
xyx xy|x x|xy|x x|yy|yx xy x x x

      [download]

      Examine what is said, not who speaks.

      The 7th Rule of perl club is -- pearl clubs are easily damaged. Use a diamond club instead.

[reply]
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