http://learn.perl.org/faq/perlfaq4.html#How-do-I-sort-an-array-by-anything-

http://perldoc.perl.org/perlfaq4.html#How-do-I-sort-an-array-by-%28anything%29%3f

Sorting ip addresses quickly

In reply to Re^3: opening many files by Anonymous Monk
in thread opening many files by wanttoprogram

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