Here is the idea: I'd like to take an array of 1..16 numbers and I'd like to build an array of hashes that is composed of the following:

{"LIST"}a list (in ascending order) of between 2 and 15 indexes from the initial array
{"VALUE"}the result of an operation performed on each of the elements of the array that are indexed by {"LIST"}

The elements of the hasharray would be all the possible combinations (order ignored) of the given array elements.

So, for the array:

$array[0] = 1
$array[1] = 2
$array[2] = 3

[download]
The result (assuming an operation of "+") would be something like the following array:
$ArrayHash[0]->{"LIST"} = (0,1)
$ArrayHash[0]->{"VALUE"} = 3
$ArrayHash[1]->{"LIST"} = (1,2)
$ArrayHash[1]->{"VALUE"} = 5
$ArrayHash[2]->{"LIST"} = (0,2)
$ArrayHash[2]->{"VALUE"} = 4
$ArrayHash[3]->{"LIST"} = (0,1,2)
$ArrayHash[3]->{"VALUE"} = 6

[download]

I've coded this with a bunch of nested loops, but the code is really, really ugly and I'm thinking that PERL must offer something more elegant. Any ideas?

Thanks!

In reply to array problems by bfish

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