atemon has asked for the wisdom of the Perl Monks concerning the following question:
Hi Monks,
I have two regular expressions.
$exp1 is stored in a MySQL table and user is entering $exp2 from a UI. We know that $exp1 will match all strings matched by $exp2. So I want to compare the two expressions. If I use any operator like eq or cmp I will get this as unequal. If I compare like $exp1 =~ /^$exp2/ or $exp2 =~ /^$exp1/, it won't match as the meta characters like * has a different meaning on LHS and RHS of =~. Is there a way other than parsing the string to match them?$exp1 = "123*" $exp2 = "1233*"
$exp1 is from DB and $exp2 is entered. Since $exp1 will match all expressions that would be matched by $exp2, I dont want to insert $exp2 into DB.
Cheers !
--VC
Gods Own Country...
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Replies are listed 'Best First'. | |
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Re: Compare two regex patterns
by moritz (Cardinal) on Mar 06, 2008 at 07:48 UTC | |
by vbar (Novice) on Mar 06, 2008 at 10:00 UTC | |
by moritz (Cardinal) on Mar 06, 2008 at 10:22 UTC | |
by vbar (Novice) on Mar 06, 2008 at 17:48 UTC | |
by Anonymous Monk on Mar 23, 2008 at 00:54 UTC | |
by Anonymous Monk on Mar 23, 2008 at 00:39 UTC | |
Re: Compare two regex patterns
by zer (Deacon) on Mar 06, 2008 at 06:27 UTC | |
by ikegami (Patriarch) on Mar 06, 2008 at 15:38 UTC | |
Re: Compare two regex patterns
by quester (Vicar) on Mar 06, 2008 at 07:19 UTC | |
Re: Compare two regex patterns
by Bloodrage (Monk) on Mar 06, 2008 at 08:46 UTC | |
Re: Compare two regex patterns
by linxdev (Sexton) on Aug 27, 2014 at 01:31 UTC |
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