标签：数组 array bsp 使用 new var nbsp
var arr=["aa","bb","cc"]; //3
var arr1=new Array(); //0
var arr2=new Array(20); //20
var arr3=new Array("aa","bb","cc"); //3
数组的使用
原文地址：https://www.cnblogs.com/tongguilin/p/12160007.html
