TDD Interview Q 2 CMM

trials2.js

(function tester(func) {
	console.log(func([],[]), 'should be []');
	console.log(func([1,2],[1,2]), 'should be [1,1,2,2]');
	console.log(func([1,2],[1]), 'should be [1,1,2]');
	console.log(func(['hi'],[undefined, 'lo']), 'should be [hi,undefined, lo]');
	console.log(func([2,3],[]), 'should be [2,3]');
	console.log(func([],[2,'und', 5]), 'should be [2,und,3]');
})(function concat(arr1, arr2){
	var catted = [];
	var iter = 0;
	while (iter < arr1.length || iter < arr2.length){
		if (iter < arr1.length) {
			catted.push(arr1[iter]);
		}
		if (iter < arr2.length) {
			catted.push(arr2[iter]);
		}
		iter++;
	}
	return catted
});