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http://stackoverflow.com/questions/9043712/locale-... 
It affects at least the following:
Collation: the regex [a-f] imbued with a French locale should match the character é. torti[x]a in a Spanish locale should match "tortilla", as the double-l is counted as a single character.
Similarly, \w in a Finnish locale should match the character ä (but [a-z] should not, as å, ä and ö collate after z in Finnish.
In a Unicode compatible locale, the Unicode equivalence algorithm should be used, so that composed forms of a character match a decomposed form and vice versa.
With a POSIX-compatible regex flavor (basic, extended, awk, grep, and egrep), the POSIX character classes should be locale-aware: [=e=] should match é in a French locale but not in an English locale.
It affects at least the following:
Collation: the regex [a-f] imbued with a French locale should match the character é. torti[x]a in a Spanish locale should match "tortilla", as the double-l is counted as a single character.
Similarly, \w in a Finnish locale should match the character ä (but [a-z] should not, as å, ä and ö collate after z in Finnish.
In a Unicode compatible locale, the Unicode equivalence algorithm should be used, so that composed forms of a character match a decomposed form and vice versa.
With a POSIX-compatible regex flavor (basic, extended, awk, grep, and egrep), the POSIX character classes should be locale-aware: [=e=] should match é in a French locale but not in an English locale.
Young professional woman and busy mom.
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■ @ 2012-06-04 11:57:48.0 di altg
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■ @ 2012-06-04 12:02:31.0 di avvelentani
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■ @ 2012-06-04 12:04:14.0 di ::1
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■ @ 2012-06-04 13:13:59.0 di altg
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■ @ 2012-06-04 12:10:57.0 di avvelentani
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■ @ 2012-06-04 12:32:30.0 di exsinistro
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