js数组中的数组去重和多维数组

1.数组去重

思路：新建一数组，遍历传入数组，若元素不在新数组中就添加到新数组中。

注意：判断值是否在数组的方法“indexOf”是ECMAScript5方法，IE8以下不支持，需多写兼容低版本浏览器代码。

	function quchong(arr){
		var b = [];
		for (var i = 0; i < arr.length; i++) {
			if (b.indexOf(arr[i]) == -1) {
				b.push(arr[i]);
			}}
			return b;
		}
	document.write(quchong(a));

2.多维数组

javascript不支持真正的多维数组，但可以用数组的数组来近似访问数组中特定的数值代码为arr[x][y]

	var a = [1,2,3];
	var b = [ [1,2,3] , [11,22,33] ];
	var arr = [
			[ ["盖伦1","流浪法师","盖盖"],["肖战","赞赞"],["5","20"] ],
			[ ["邓伦","大帅哥","灯芯"],["你好","呀"],["5","21"] ],
			[ ["王俊凯","大明星","小螃蟹"],["你好","赞呀"],["13","14"] ],
		];
	for( var i in arr ){
		for( j in arr[i]){
			for( m in arr[i] [j]){
				console.log(arr[i][j][m]+'<br/>');
			}
		}
	}