javascript Array数组类详解

 

concat尾巴插入

var arr = new Array(4);

arr[0] = "a";

arr[1] = "b";

arr[2] = "c";

arr[3] = "abcd";

var arrs = arr.concat("sdfsdf","asdfsadf");

arr.concat("sdfsdf","asdfsadf");

alert(arr.join('|'));　　//a|b|c|abcd

 

slice截取  1个参数是从n开始到结束。2个参数第2个参数是取前面一位。

 

var acolor=["red","green","red","yello"];
var acolor1 = acolor.slice(1);
alert(acolor1.toString());//output   "green,red,yello"
var acolor2 = acolor.slice(1,3);
alert(acolor2.toString());//  "green,red,yello" 

 

push 结束的地方添加

acolor1.push("black");　　//output "red,green,red,yello,black"

pop尾巴处删除一项

acolor1.pop();　　

shifte删除第一项

acolor1.shift();