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views:

60

answers:

1
+3  Q: 

Double plusses in regex

I have seen several regular expressions that have two plusses in a row. What exactly does this mean? One or more of one or more of the pattern. If the pattern matches in the first place, why would the second match be necessary?

Examples:

[a-zA-Z0-9_]++
[^/.,;?]++
+6  A: 

They're called possessive quantifiers.

Bart Kiers  2009-11-26 05:55:42
Ahhh RegEx... there is so much to it!
Salman A  2009-11-26 06:08:01

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