in reply to Creating hash of arrays (in a faster way)

I'd do it this way. I doubt it is any faster than your's, but destroying the input array by a thousand paper cuts seems gratuitous:

@cols = qw(min max sum min max sum);;
@values = qw(1 3 4 7 8  9);;

push @{ $hash{ $cols[ $_ ] } }, $values[ $_ ] for 0 .. $#values;;

pp \%hash;;
{ max => [3, 8], min => [1, 7], sum => [4, 9] }

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I think the real question here is: where do the inputs arrays come from? Is it necessary to build them before constructing the array, or could the hash be built directly from wherever the arrays are populated from?

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