Thanks LanX,

Your added print statements are very similar to what I had been using myself, but far more visually helpful.

My problem stems from this point in the output:

 1:
  2:a
   3:ab
    4:abc
     5:abcd
abcd
    4:abd
     5:abdc

[download]

I understand the 1:-5: lines, and the bare abcd. I get how they were generated and where they came from. But I am not following the logic of how it then goes from $perm = abcd and @set=[] to $perm = abd and @set=[c], or how $level went from 5 back to 4.

Any way you would be able to clarify that?

Thanks!

Matt

In reply to Re^2: Please help me understand this permutation sub? by mdunnbass
in thread Please help me understand this permutation sub? by mdunnbass

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