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Re: RegEx question

by crashtest (Curate)
on Feb 04, 2010 at 01:04 UTC ( #821294=note: print w/replies, xml ) Need Help??

in reply to RegEx question

The pipe in the second block turned your regex into one that will match any string, including Joe Blow, Amelia Earhardt and Barack Obama. With the trailing pipe, your code now says: Match tom jones, or greg herman, or... whatever. So whatever matches.

The problem with the regex in the first block is that you're using the x modifier, something you appear to have forgotten when you wrote tom jones and greg herman. Note the space in between the first and last names - Perl is ignoring it. That regex will in fact match the string tomjones and gregherman. To make it work the way you want it to, you have to say tom\sjones | greg\sherman.

Hope this helps!

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Re^2: RegEx question
by erabus (Sexton) on Feb 04, 2010 at 01:32 UTC
    Thank you.

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[marto]: not if you keep telling people :P
[zentara]: I had to disable hyperthreading on my machine because of that.
[Discipulus]: thanks marto but... at the moment this seems a bit beyond my faculties.. ;=)
[zentara]: a thread goes into a wait state after emitting a wait to all other threads. It locks up a machine completely.
[marto]: if you mean the recent hyperthreading bug, I don't think that's NSA related?
[zentara]: s/thread/cpu/
[marto]: xkcd://538
[Discipulus]: these opcodes mentioned in the wiki pages are the same opcode perl is translated into? or is just the same term but in different fields?
[zentara]: it's useful if you want to lockup a multicore machine :-)

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