编程篇(011)-编写一个数组去重的方法

var arr = [1, 2, 3, 3, 4, 4, 5, 5, 6, 1, 9, 3, 25, 4];

function deRepeat() {
    var newArr = [];
    var obj = {};
    var index = 0;
    var l = arr.length;
    for (var i = 0; i < l; i++) {
        if (obj[arr[i]] == undefined) {
            obj[arr[i]] = 1;
            newArr[index++] = arr[i];
        } else if (obj[arr[i]] == 1) continue;
    }
    return newArr;
}
var newArr2 = deRepeat(arr);
console.log(newArr2); //输出1,2,3,4,5,6,9,25