Hi tybalt89!

Great post!
However, I am not convinced that your implementation would be more efficient than any of the "2 pass solutions".
I thought my response to the OP at Re: assigning arrays as values to keys of hash to be reasonable and importantly: understandable by the OP.

I think that sometimes PerlMonks fails new Perler's with overly complicated solutions that they can't understand or generalize.
This OP is a beginner, not by user name, but by his original code.

Your solution hides a foreach loop in terms of a map{} which does a lot of work. Shorter Perl code doesn't always mean "faster".

In reply to Re^2: assigning arrays as values to keys of hash by Marshall
in thread assigning arrays as values to keys of hash by pearllearner315

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