Aristotle's solution is fastest (about 6x faster), even when modified for proper ordering, but it's not terribly intuitive. I'd personally go with slower and easier to understand: 
@array = sort { lc($a) cmp lc($b) || $b cmp $a } @array;

[download]
This does more or less the same thing as the first solution, only neater.

In reply to Re: How to sort in this upper / lower case? by TedPride
in thread How to sort in this upper / lower case? by gube

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