小编Yum*_*ark的帖子

我得到了这个字符串：

var myMessage = "Learning is fun!"

这就是我尝试创建一个仅列出字母的数组（没有空格和“！”）的方法。

var myMessage = "Learning is fun!";
var arr1 = myMessage.split("");

function onlyLetters(array){
    let arr2 = []
    for(let i = 0; i < array.length; i++){
        if(array[i] === "a" || "b" || "c" || "d" || "e" 
        || "f" || "g" || "h" || "i" || "j" || "k" || "l" 
        || "m" || "n" || "o" || "p" || "q" || "r" || "s" 
        || "t" || "u" || "v" || "w" || …