Re^2: Fine tuning a reg exp

/^[[:upper:]]+$/
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I’ve never understood why people use that instead of the much easier to type, read, and use \p{upper}. Can you tell me why?

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Re^3: Fine tuning a reg exp by choroba (Cardinal) on Feb 24, 2012 at 00:11 UTC
Because the former works in a shell and sed, too?	[reply]
Re^4: Fine tuning a reg exp by runrig (Abbot) on Feb 24, 2012 at 01:12 UTC
Habit, and what choroba said (update: meant to reply to tchrist).	[reply]