题解 | #计数器#
计数器
https://www.nowcoder.com/practice/59154c37d06c41b5b0e19b3b26272229
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
</head>
<body>
<script type="text/javascript">
const closure = () => {
// 补全代码
let num = 1;
return function() {
return num++;
}
}
</script>
</body>
</html>
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