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This seems to rely on luck as the block may yield "" which sort is not advertised to accept.
That code always returns 1 or -1 AFAICT. Can you explain?

Update: it will return false if $a or $b isn't any of the types tested for, but false isn't "", it's both 0 and "":

$ perl -we'@_ = sort { "" } 1,2' Sort subroutine didn't return a numeric value at -e line 1. $ perl -we'@_ = sort { !1 } 1,2'

In reply to Re^3: Pearls (not really) of Perl programming by ysth
in thread Pearls (not really) of Perl programming by PetaMem

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