js ½«Êý×éת³É¶ººÅ·Ö¸ôµÄ×Ö·û´®

let arr = new Array(3);
arr[0] = "Zero";
arr[1] = "One";
arr[2] = "Two";
let result =  arr.join(",")
console.log(result)
//Êä³ö½á¹û：
=> "Zero,One,Two"