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Re: [perl_advanced_programmming] Reg: Clarification in Patte
Joined: 21 May 2004
Posts: 44
Re: [perl_advanced_programmming] Reg: Clarification in Patte
>>>>> "Krishna" == Krishna Prasad <skpkrish@...> writes:
Krishna> I have a very small clarification in pattern
Krishna> matching, though it seems to be so silly I`m not able
Krishna> to find a solution, please help me in this regard. I
Krishna> want to match a string into which a particular string
Krishna> should not be present, i.e. You can assume any string
Krishna> which contains lots of words out of which i want to
Krishna> match a pattern in which words starting with "b"
Krishna> should be matched and ending should be "y" and
Krishna> between "b" and "y" no "a" should be present. This
Krishna> can be done using m/b(?!a)y/ig, but it is not working
Krishna> right for me. In detail, i want to search for html
Krishna> tags i.e. <b> and i should match start <b> and end
Krishna> </b> inside of which no <b> tag should be
Krishna> present. Please help me in this regard.
The primary way to do that is to inchworm along:
m{
<b> # match start tag
(?: # begin inchworm group
(?! <b> | </b> ) # while not start or end tag
. # move one character (the inchworm)
) * # for 0 or more times
</b> # match end tag
}xs
--
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