题解 | #计数器# 前加加后加加
计数器
https://www.nowcoder.com/practice/59154c37d06c41b5b0e19b3b26272229
<script type="text/javascript">
const closure = () => {
// 补全代码
<!-- timer++是先返回再加一，下列形式也可以写成++timer -->
let timer=0
return function(){
timer++
return timer
}
}
</script>