统计的树形结构下所有符合条件的子节点的数量

城南挽风

于 2021-07-14 16:46:00 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/yasuifi/article/details/118731628

这篇博客介绍了一个JavaScript函数，用于递归计算具有层级结构的JSON对象中叶子节点的数量。函数`getLeafCountTree`遍历数据，记录每个节点的`colspan`属性，最终返回叶子节点总数。在示例中，展示了如何应用该函数于一个具体的JSON数据结构。

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>json-query</title>
    <script type="text/javascript">
        const arr = [
            {
                "name": "aaa",
                "Children": [
                    {
                        "name": "aaa",
                        "Children": [
                            {
                                "name": "ccc",
                                'type': 'none',
                                "Children": [
                                    {
                                        "name": "ccc",
                                        "Children": []
                                    }
                                ]
                            },
                            {
                                "name": "eee",
                                "Children": []
                            }
                        ]
                    }
                ]
            }]
    </script>

    <script type="text/javascript">
        function getLeafCountTree(data) {

            if (data.Children.length == 0) {
                data.colspan = 1;
                return 1;
            } else {
                var leafCount = 0;
                for (var i = 0; i < data.Children.length; i++) {
                    leafCount = leafCount + getLeafCountTree(data.Children[i]);
                }
                data.colspan = leafCount;
                if (data.type === "none") {//特殊节点不计算在内
                    return leafCount;
                } else {
                    return leafCount + 1;
                }

            }
        }
        console.log(getLeafCountTree(arr[0]))
    </script>
</head>

<body>
</body>

</html>

效果图：