Although that "push" line is quite interesting. perl++

The "push" line isn't the punchline. The punchline is how you calculate $low for the splice, which amounts to 7 iterations of the while loop for the sample data. Then, the array reordering is done with one fell swoop. Takes some time to grok that. tybalt89++

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re^2: Fastest way to sort a list of integers into 0,1,2,3,-3,-2,-1 by shmem
in thread Fastest way to sort a list of integers into 0,1,2,3,-3,-2,-1 by haukex

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