JavaScrip对象

var arr = new Array();
arr[0] = "ZS";
arr[1] = "LS";

var arr = new Array(2);
arr[0] = "ZS";
arr[1] = "LS";
arr[2] = "WW";
arr[3] = "SL";

var arr = new Array("ZS","LS","WW");

var arr = ["ZS","LS","WW"];

var arr = ["ZS",1,"LS","WW"];
/*通过索引获取数据*/
alert(arr[2]);
alert(arr.length);

var arr = ["ZS", "LS", "WW", "SL"];

/*1.join:将数组元素按照指定的分隔符进行分隔，返回字符串*/
var newArr = arr.join(" | ");
document.write(newArr);
 
/*2.concat：连接数组元素和数组*/
var arr2 = ["WB","BJ"];
var arr3 = ["WB2","BJ2"];
var newArr = arr.concat("TQ","WB");/!*添加多个数组元素*!/
var newArr = arr.concat(arr2,arr3);/!*添加多个数组*!/
var newArr = arr.concat("TQ",arr2);/!*同时添加数组元素和数组*!/
document.write(newArr);
 
/*3.push:在数组末尾添加一个或多个数组元素，返回值为新数组的长度*/
arr.push("TQ","WB");
document.write(arr);
 
/*4.pop:删除并返回数组的最后一个元素*/
/*var deletedEle = arr.pop();
document.write(deletedEle);
document.write("<br>");
document.write(arr);*/
 
/*5.shift:删除并返回数组的第一个元素*/
var deletedEle = arr.shift();
document.write(deletedEle);
document.write("<br>");
document.write(arr);
 
/*6.unshift:在头部插入数组元素，返回数组长度*/
var newArr = arr.unshift("DXE");
document.write(newArr);
document.write(arr);
 
7.sort :数组排序*/
/*var newArr = arr.sort();
document.write(newArr);*/
/*function sN(a,b) {
return b - a ;
}
var numArr = [97,98,89,56,73,9,10,];
var newArr = numArr.sort(sN);
document.write(newArr);
 
/*8.reverse:数组倒序*/
var newArr = arr.reverse();
document.write(newArr);
 
/*9.splice:删除或者添加数据 返回被删除的元素
* 1：操作元素的起点 如果为负值，从数组尾部开始操作
* 2：操作的数量
* 3：进行添补的数据*/
var newArr = arr.splice(1,1);
document.write(newArr);
var newArr2 = arr.splice(-2,1);
document.write(newArr2);
var newArr3 = arr.splice(1,0,"TQ");
document.write(newArr3);
document.write("<br>");
document.write(arr);
 
/*10.slice:用来从数组中截取数据 返回截取的元素
* 1：截取的起点索引（包含）
* 2：截取的终点索引（不包含）如果不写，默认截取到最后一个*/
var result = arr.slice(-1);/*截取最后一个*/
var result = arr.slice(1);/*截取从第二个到最后一个*/
var result = arr.slice(1,3);/*截取从第二个到第三个*/
document.write(result);
document.write("<br>");
document.write(arr);

var Ture = new Boolean(true);
var Ture = true;
alert(Ture);