The application I originally wrote nFor() for needed to be as efficient as possible:

So make a module. Don't suggest that the OP use and support that big chunk of complex code.

and your my code is infinitely simpler to modify than NestedLoops().

Really? Unless each level of nesting is the same, nFor degrades to 

nFor { print map $lists[$_][ $_[$_] ], 0..$#_; } map 0+@$_, @lists;

[download]

I wrote that and I can't even read it.

In reply to Re^6: Generating lists of strings by ikegami
in thread Generating lists of strings by Anonymous Monk

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