Thanks for the explanation.

The current interface guarantees lexicographic order

It is easy to adjust my iterator to get lexicographic order. For example, just add one reverse: 

    $left= [ @$left, reverse @{$redo[$i]} ];

[download]

I plan to add a version to Algorithm::Loops before I die. (:

- tye        

In reply to Re^4: Derangements iterator (order) by tye
in thread Derangements iterator by tye

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