Oh, sort does remember you choices. It's not that it
keeps a record, but it is remembered in the way the data is
shuffled around. Otherwise, there wouldn't be O (n log n)
sorts.
As for the segfaults, pre-5.6 perls used the qsort
available in your C libraries. And that might segfault when given
inconsistent choices. 5.6.x has its own quicksort, which will
not segfault when given inconsistent choices. From 5.8 on, you can
actually choice between mergesort (default) and quicksort.
Abigail
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