1.创建数组并为其赋值
var mycars = new Array();
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "BMW";
var myCars=new Array("Saab","Volvo","BMW");
var myCars=["Saab","Volvo","BMW"];
2.访问数组
var name=myCars[0];
3.修改数组
myCars[0]="Opel";
map: 遍历并返回新数组
<buttonid="btn">点我</button>
varbtn = document.getElementById("btn");
var numbers = [25,36,121,49];
function myFunction(num,index,arr){
console.log(num); //遍历numbers数组
return num*10; //返回新数组
}
btn.onclick =function(num){
var renArr = numbers.map(myFunction);
console.log(renArr); //输出新数组
}
push
var numbers = [25,36,121,49];
numbers.push(3); //在numbers的结尾添加字符串
numbers.pop(); //删除末尾的字符串
