字符串全排列非递归

		function iterSort(arr) {
    		var result = [], len = arr.length;
    		arr.sort();
    		result.push(arr.join(''));
   	 		while (true) {
        		var temp;
        		for (var i = len - 1; i >= 1; i--) {
		            if (arr[i] > arr[i - 1]) {
		            	console.log(i, arr[i], arr[i - 1], arr.toString());
		            	temp = i - 1;
		            	break;
		            }
		        }
 		        if (i === 0) {
 		        	break;
 		        } 
		        for (i = len - 1; i > temp; i--) {
		            if (arr[i] > arr[temp]) {
		                swap(arr, i, temp);
		                reverseI(arr, temp + 1);
		                result.push(arr.join(''));
		            }
		        }
		    }
		    return result;
		}
		function swap(arr, i, j) {
		    arr[i] = [arr[j], arr[j] = arr[i]][0];
		}
		function reverseI(arr, i) {
		    var temp = arr.slice(i);
		    [].splice.apply(arr, [i, temp.length].concat(temp.reverse()));
		}