Can't figure out why this regex doesn't match pattern

Hi All,

I can't figure out why this regex:
"[(thusmiannqa01)|(thusmiannsql13)] -
[(agr)|(dm)|(emp)|(hp)|(mcd)|(ssc)]\w*"

does not match this pattern:
"thusmiannqa01 - emp30_206_bld_sec_sc19"

The string before the dash does not match, but the string
after the
dash does match. I'm at wits end with this one. Can anyone
see what I'm
missing?


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"Everyone" <matt.slavicekgmail.com> wrote:
>I can't figure out why this regex:
>"[(thusmiannqa01)|(thusmiannsql13)] -
>[(agr)|(dm)|(emp)|(hp)|(mcd)|(ssc)]\w*"

A number of problems.  The biggest one is that you're
putting groups in []
-- [] is for character classes not groups of text -- you
could put [a-z] to
match a-z but putting (thusmian etc. in there is causing it
to literally
look for the letters in that class in no particular order.

Try this one:
I've made most of the parenthetical capture groups
non-capturing with (?
-- so this match should include just 3 backreferences --
thusmiannqua02,
emp, and 30...etc.

((?:thusmiannqa01)|(?:thusmiannsql13)) -
((?:agr)|(?:dm)|(?:emp)|(?:hp)|(?:mcd)|(?:ssc))([\w]+)


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Ok, I replaced the square brackets with parens, and that did
the trick.
I think that's all I need.

I'm not sure what the difference is between a capturing
group and
non-capturing group. Could you elaborate a little on that?


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