Returns combinations of given values.

combinations.coffee

combine = (list, index = 0, combination = [], result = []) ->
  if (list[index])
    for value in list[index]
    	combination[index] = value;
    	combine(list, index + 1, combination, result);
  else
    result.push(combination[..]);
  
  return result;

combinations.js

function combine(list, index, combination, result) {
    if (index == void 0) {
        index = 0;
        combination = [];
        result = [];
    }

    if (list[index]) {
        for (var i = 0; i < list[index].length; i++) {
	        combination[index] = list[index][i];
	        combine(list, index + 1, combination, result);
	    }
    } else {
        result.push(combination.slice(0));
    }

    return result;
}