// should mimic python zip
/* console.log(zip([1,2,3],[1,2,3,4,5]));
   console.log(zip([1,null,3],[1]));
   console.log(zip([1,2,3],[1,2,3]));
   console.log(zip([1]));
   console.log(zip());
*/

function zip(){
    var ret = [];
    if (arguments.length > 1){
        for (var r = 0,rl = arguments[0].length; r<rl; r++){
            var curr = [];
            for (var c = 0,cl = arguments.length; c<cl; c++){
                var curv = arguments[c][r] === undefined ?
                    undefined : arguments[c][r];
                curr.push(curv);
            }
            ret.push(curr);
        }
    } else if (arguments.length)
        ret.push(arguments[0]);
    return ret;
}