JavaScript操作数组的常用方法总结

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

var a = "abc,abcd,aaa";
var b= a.split(",");// 在每个逗号(,)处进行分解。
console.log(b);

Array.prototype.duplicateRemoval = function () {
 var n = []; //一个新的临时数组
 for (var i = 0; i < this.length; i++) //遍历当前数组
 {
  //如果当前数组的第i已经保存进了临时数组，那么跳过，
  //否则把当前项push到临时数组里面
  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=["张三","李四","王五"];
var arr2=["Tom","Jack","TM"];
arr1.concat(arr2);

var arr1=["张三","李四","王五"];
var arr2=arr1.join(',');
console.log(arr2);

var arr1=["张三","李四","王五"];
arr1.pop();
console.log(arr1);

var arr1=["张三","李四","王五"];
arr1.push("赵六");
console.log(arr1);

var arr1=["张三","李四","王五"];
var arr2=arr1.reverse();
console.log(arr2);

var arr1=["张三","李四","王五"];
arr1.shift();
console.log(arr1);

var arr1=["张三","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=["张三","李四","王五"];
var arr2=arr1.splice(1,1,"赵六");
console.log(arr1);

var arr1=["张三","李四","王五"];
var arr2=arr1.toString();
console.log(arr2);

var arr1=["张三","李四","王五"];
var arr2=arr1.toLocaleString();
console.log(arr2);

var arr1=["张三","李四","王五"];
arr1.unshift("第一个");
console.log(arr1);

var arr1=["张三","李四","王五"];
var arr2=arr1.valueOf();
console.log(arr2);