题解 | #Array.map#
Array.map
https://www.nowcoder.com/practice/8300c998180c4ebbbd2a5aaeb7fbc77c
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
/* 填写样式 */
</style>
</head>
<body>
<!-- 填写标签 -->
<script type="text/javascript">
//
Array.prototype._map = function(Fn) {
if(typeof Fn != 'function') return
//进行循环
const newArr = []
for(let i = 0;i < this.length;i++){
newArr[i] = Fn(this[i])
}
return newArr
}
</script>
</body>
</html>
