版权声明:版权是个什么玩意儿?看得上随便转 https://blog.csdn.net/Byte_Dance/article/details/86552927
<script>
let str = " H e l l o ";
function mapping(str){
let newArr = [];
let arr = str.split("");
for(let i = 0;i<arr.length;i++){
//设置正则表达式 匹配只有 数字+大小写字母
if(arr[i].match("[0-z]")){
newArr.push(arr[i]);
}
}
return newArr.join("");
}
alert(mapping(str));
</script>