> 数组的常用写法介绍
[TOC]
### 初始化
~~~
var list = [];
//var list = new Array();
list[0] = "aaa";
list[1] = "bbb";
list[2] = "ccc";
// 简介写法
//var list = ['xx', 'bb'];
//var list = new Array('xxx', 'vvv');
~~~
## 向数组添加新元素：push()
~~~
var myarray = ["b1", "b2", "b3", "b4"];
myarray.push("b5");
~~~
## 合并多个数组：concat()
~~~
var arr1 = ["aaa", "bbb"];
var arr2 = ["ccc", "ddd", "eee"];
var newArr = arr1.concat(arr2);
console.log(newArr)
~~~
## 数组元素组合成字符串：join()
~~~
var fruits = ["aaa", "bbb", "ccc", "ddd"];
console.log(fruits.join('___'))
~~~
## 数组排序：sort()
> sort() 函数按照字符串顺序对值进行排序
> 但是，如果数字按照字符串来排序，则 "25" 大于 "100"，因为 "2" 大于 "1"，这个时候就需要用到闭包方式
~~~
// 简单比值
var points = [5,1,10];
points.sort(function(a, b){
return a - b
})
// 返回1,5,10
console.log(points)
// 复杂比值
var list = [
{name:'wk11', points:11},
{name:'kk1', points:1},
{name:'xx20', points:20}
];
list.sort(function(a, b){
return a.points - b.points
})
// 返回kk1, wk11,xx20
console.log(list)
~~~
## 数组遍历：参考for篇
