/*
第4種情況，用slice能實現“a&bb&cc&d”嗎？
*/
let arr = ['a', ['bb','cc'], 'd'];
let ret = arr.join();
//1
console.log(ret); //"a,bb,cc,d", 與arr.join(',');一樣
//2
let ret _1= arr.join('');
console.log(ret_1); //abb,ccd
//3
let ret _2= arr.join(','); //"a,bb,cc,d", 同arr.join()；
console.log(ret_2);
//4
let ret _3= arr.join('&');
console.log(ret_3); //a&bb, cc&d
Javascript代碼的小小疑問 2018-6-2
泛舟湖上清波郎朗
2018-12-07 05:26:44
