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Re: Problem with regular expression

by MARVion (Novice)
on Feb 13, 2013 at 09:38 UTC ( [id://1018510]=note: print w/replies, xml ) Need Help??


in reply to Problem with regular expression

Hi again,

well, with a litte change Utilitarian's Code works perfectly for me. 

TFS[-_\s]?(?:CR|ID)?:?\s?([1-9]\d+)

[download]


However, I would appreciate it, if you could explain this section to me, as I'm not that familiar with regular expressions but for sure I want to learn to use them!

(?:CR|ID)?

Greetz

MARV

Replies are listed 'Best First'.
Re^2: Problem with regular expression
by Utilitarian (Vicar) on Feb 13, 2013 at 13:24 UTC
    oops, I missed the one with a colon :( 
    (?: # begin non capturing group
CR|ID # alternation accepts either pattern group 'CR' or 'ID'
)? # group is optional

    [download]

    print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."
[reply]
[d/l]
[select]

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