Re: Redundant regex ([0-9]{2}


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Re: Redundant regex ([0-9]{2} | [0-9] {2, 4})?

by ikegami (Patriarch)

on Feb 26, 2009 at 22:42 UTC ( [id://746694]=note: print w/replies, xml )

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in reply to Redundant regex ([0-9]{2} | [0-9] {2, 4})?

No, /[0-9]{2} / does not match a subset of what / [0-9] {2, 4}/ matches.

/[0-9]{2} / only matches "99\x{20}", where 9 can by any digit 0-9
/ [0-9] {2, 4}/ only matches "\x{20}9\x{20}{2,\x{20}4}", where 9 can by any digit 0-9

Update: Fixed copy and paste bug in in second item.

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Re^2: Redundant regex ([0-9]{2} \| [0-9] {2, 4})? by Popcorn Dave (Abbot) on Feb 27, 2009 at 00:34 UTC
Holy crap, I need glasses! I completely missed the space in there and didn't realize it until I increased the font size. That makes perfect sense now. Duh. To disagree, one doesn't have to be disagreeable - Barry Goldwater	[reply]
Re^3: Redundant regex ([0-9]{2} \| [0-9] {2, 4})? by ikegami (Patriarch) on Feb 27, 2009 at 01:35 UTC
Spaces removed, /`[0-9]{2}`/ does match a subset of what /`[0-9]{2,4}`/ matches. I'm sure what he wanted was just /`[0-9]{2,4}`/.	[reply] [d/l] [select]

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