Interleaves two lists to form a shuffled list. Use like %hash = interleave(keys, values) (Update: thanks to all for the feedback. renamed and retitled as interleave, removed explicit arrays from example.)
sub interleave { @_[map $_&1 ? $_>>1 : ($_>>1)+($#_>>1), 1..@_] }

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In reply to interleave (single shuffle) by ysth

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