Question

I am adding two matrices (or possibly many) in ActionScript 3.0.

Now my problem is how can I add indexes in array that is something like this?

array1[1,2,3,4] + array2[2,4,5,6] = answer[3,6,8,10]

Answer 1

This function adds up all the arrays that are passed to it:

function sumOfArrays(...args):Array
{
    var sum:Array = [];
    var arrays:Array = [];
    var longestArrayLength:uint = 0;

    for (var i:int = 0, n:int = args.length; i < n; i++)
    {
        if (args[i] is Array)
        {
            arrays.push(args[i]);
            longestArrayLength = args[i].length > longestArrayLength ? args[i].length : longestArrayLength;
        }
    }

    for (var j:int = 0; j < longestArrayLength; j++)
    {
        sum[j] = 0;

        for (i = 0; i < n; i++)
        {
            sum[j] += isNaN(arrays[i][j]) ? 0 : arrays[i][j];
        }
    }

    return sum;
}

It can be used like this:
var sum:Array = sumOfArrays(array1, array2);