You probably meant @temp = sort { $a->[0] <=> $b->[0] } @temp;

Although, given a @temp array, it benchmarks faster to do 
@temp = map { length $_ } @strings;
@sorted = @strings[sort{$temp[$a]<=>$temp[$b]} $[..$#temp];

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In reply to Re: Efficient sorting using the Schwartzian Transform by I0
in thread Efficient sorting using the Schwartzian Transform by chromatic

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