I agree with you and thank you, LanX, I am really not against using a HoH. But there are some cases where a HoH is really the natural data structure, and others where it is debatable. In this specific case, I would think that a HoH does not bring any algorithmic advantage (that's what I tried to show), so that using two hashes is simpler for the beginner. But I am perfectly happy with a HoH.

On your second point, well, yes, maybe, the only aim was just to print the output to show the results. The map function is the first one that came to my mind to format the output, using join is also a good possibility (perhaps a bit clearer to the beginner). But this is really just a result formatting issue. In brief, as we all know, TIMOWTDI.

In reply to Re^3: Unique key identifer? by Laurent_R
in thread Unique key identifer? by lecb

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