var a=[1,2,3,4,5,6];
var b=a.join(',');
console.log(b);

var a = "abc,abcd,aaa";
var b= a.split(",");// 在每個逗號(,)處進行分解。
console.log(b);

Array.prototype.duplicateRemoval = function () {
 var n = []; //一個新的臨時數(shù)組
 for (var i = 0; i < this.length; i++) //遍歷當前數(shù)組
 {
  //如果當前數(shù)組的第i已經(jīng)保存進了臨時數(shù)組，那么跳過，
  //否則把當前項push到臨時數(shù)組里面
  if (n.indexOf(this[i]) == -1) n.push(this[i]);
 }
 return n;
}
var a=[1,1,2,2,3,4,5,5,7,7];
a.duplicateRemoval();

var arr1=["張三","李四","王五"];
var arr2=["Tom","Jack","TM"];
arr1.concat(arr2);

var arr1=["張三","李四","王五"];
var arr2=arr1.join(',');
console.log(arr2);

var arr1=["張三","李四","王五"];
arr1.pop();
console.log(arr1);

var arr1=["張三","李四","王五"];
arr1.push("趙六");
console.log(arr1);

var arr1=["張三","李四","王五"];
var arr2=arr1.reverse();
console.log(arr2);

var arr1=["張三","李四","王五"];
arr1.shift();
console.log(arr1);

var arr1=["張三","李四","王五"];
var arr2=arr1.slice(1,2);
console.log(arr2);

var arr1 = [11,2,28,4,5,1];
var arr2 = arr1.sort(function(a,b){
        return a-b;
    })
    console.log(arr2); 

var arr1=["張三","李四","王五"];
var arr2=arr1.splice(1,1,"趙六");
console.log(arr1);

var arr1=["張三","李四","王五"];
var arr2=arr1.toString();
console.log(arr2);

var arr1=["張三","李四","王五"];
var arr2=arr1.toLocaleString();
console.log(arr2);

var arr1=["張三","李四","王五"];
arr1.unshift("第一個");
console.log(arr1);

var arr1=["張三","李四","王五"];
var arr2=arr1.valueOf();
console.log(arr2);