console 命令行工具 X clear

console

 <script>
function swithArr(arr) {
	var newArr = [];
	for (var i = arr.length - 1; i >= 0; i--) {
	newArr[newArr.length] = arr[i]
	}
	return newArr;
}
var arr1 = swithArr([4, 8, 9, 100, 36, 52])
console.log(arr1);
var dog = swithArr(['小猫','猪','狗'])
console.log(dog);
 </script>