var arr = ["小和尚","小猴","小豬","小沙","小龍"];
var result = arr.push("江流","心猿","木龍","刀圭","意馬");
console.log("返回值："+result);
console.log("新數(shù)組:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.pop();
console.log("返回值："+result);
console.log("新數(shù)組:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.unshift();
console.log("返回值："+result);
console.log("新數(shù)組:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.shift();
console.log("返回值："+result);
console.log("新數(shù)組:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.slice(1,3);
console.log("截取到的數(shù)組："+result);
console.log("原數(shù)組不會發(fā)生改變:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.splice(1,3);
console.log("刪除到的元素："+result);
console.log("原數(shù)組會發(fā)生改變:"+arr);

var arr = ["江流","心猿","木龍","刀圭","意馬"];
var result = arr.splice(1,2,"孫悟空","豬八戒");
console.log("刪除的元素："+result);
console.log("原數(shù)組會發(fā)生改變:"+arr);

var arr = [1, 1, 5, 6, 4, 5, 2, 3, 7, 9, 4, 4, 4, 1];
for (let i = 0; i < arr.length; i++) {
    for (let j = i + 1; j < arr.length; j++) {
        if (arr[i] === arr[j]) {
            arr.splice(j, 1);//刪除當(dāng)前j所在位置的元素
            j--;//刪除j所在元素后，后邊元素會自動補位，需要重新在j這位置重新比較一次
        }
    }
}
console.log(arr);

var arr1 = ["江流","心猿","木龍","刀圭","意馬"];
var arr2 = ["唐僧","孫悟空","豬八戒","沙僧","白龍馬"];

var result = arr1.concat(arr2,"心猿意馬");
console.log("新數(shù)組："+result);

var arr = ["江流","心猿","木龍","刀圭","意馬"];

var result = arr.join("-");
console.log("新數(shù)組："+result);
console.log("result的類型為："+typeof(result));

var arr = ["江流","心猿","木龍","刀圭","意馬"];

arr.reverse();
console.log("顛倒后的arr數(shù)組："+arr);

var arr = ["a","d","g","f","k",'v',"d","x"];
arr.sort();
console.log("排序后的arr數(shù)組："+arr);

var arr = [2,14,12,3,5,53,7,31,13];
arr.sort();
console.log("排序后的arr數(shù)組："+arr);

var arr = [2, 14, 12, 3, 5, 53, 7, 31, 13];
arr.sort(function (a, b) {
   return a - b;//升序
   //return b - a;降序 
});
console.log("排序后的arr數(shù)組：" + arr);