The technique you're looking for is called a shuffle. It can be done very quickly (linear time IIRC) using standard algorithms. You can try Algorithm::Numerical::Shuffle or List::Util's shuffle function.

If your data is very large, consider sorting a list of numbers corresponding to array indices, then using those numbers as array subscripts. It will avoid making a copy of your data.

In reply to Re: unsorted list by sgifford
in thread unsorted list by thekestrel

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