js 两数组去除重复数值

//两数组去除重复数值
mergeArray: function(arr1, arr2) {
    for (var i = 0; i < arr1.length; i++) {
        for (var j = 0; j < arr2.length; j++) {
            if (arr1[i] === arr2[j]) {
                arr1.splice(i, 1); //利用splice函数删除元素，从第i个位置，截取长度为1的元素
            }
        }
    }
    //alert(arr1.length)
    for (var i = 0; i < arr2.length; i++) {
        arr1.push(arr2[i]);
    }
    return arr1;
}