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Find all strings containing "a" characters, that are not followed by "b" characters.by Kyshtynbai (Acolyte)
|on Dec 12, 2012 at 17:13 UTC||Need Help??|
Kyshtynbai has asked for the
wisdom of the Perl Monks concerning the following question:
I'm learning perl using "Lama Book" and now I'm in the world of regexps. There's an exercise in d foy's book of exercises, which I still can't solve :(. Here it is:
"Write a program to match a string that contains an “a”, but doesn’t have a “b” anywhere after the “a” ".
I've written the following regexp, and is _seems_ to be proper (I've run some tests. I really does the job as far as I notice.), but in the answers section of this book there's a rather weired way to solve this exercise, which includes two "if" blocks.Here is the regexp I've written: /\ba\b|(\b.*a[^b]+\b)/
Is it okay for this exercise, that's all I want to know :) . Thank you in advance.