Re^2: Looking for a regular expression for the following pattern.


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Re^2: Looking for a regular expression for the following pattern.

by AnomalousMonk (Archbishop)

on Mar 29, 2018 at 14:58 UTC ( #1211983=note: print w/replies, xml )

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in reply to Re: Looking for a regular expression for the following pattern.
in thread Looking for a regular expression for the following pattern.

No number of regexes and/or if-clauses will reconcile a requirement statement that doesn't state what is required.

Give a man a fish: <%-{-{-{-<

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Re^3: Looking for a regular expression for the following pattern. by Anonymous Monk on Mar 30, 2018 at 02:22 UTC
The first two requirements sound like the same thing: `/([:alnum:]+[_]+/`. But the third requirement is a subset of the first, consuming the alnum sequence with no need for underscore. Two regexes joined by `\|\|` logical-or would do it. However, it just might be as simple as replacing the last `+` in the above regex with `*` to indicate "zero or more" underscores. The pattern now looks for one-or-more alnum characters followed by zero-or-more underscores.	[reply]
Re^4: Looking for a regular expression for the following pattern. by AnomalousMonk (Archbishop) on Mar 30, 2018 at 15:03 UTC
So `'a_________' '%%a_____%%' '123456789_'` would be strings skooma would want to match? That wasn't my (limited) understanding after reading the OP. `c:\@Work\Perl\monks>perl -wMstrict -le "for my $s (qw(a_________ %%a_____%% 123456789_)) { print qq{'$s' matches} if $s =~ /[[:alnum:]]+[_]+/; } " 'a_________' matches '%%a_____%%' matches '123456789_' matches` [download] Update 1: And what about the `{ }` curlies? Update 2: And please use code tags when you post. Please see Writeup Formatting Tips and Markup in the Monastery. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]

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