mirror of
https://github.com/linghuam/boutique-books.git
synced 2024-11-22 01:24:57 +00:00
104 lines
2.6 KiB
JavaScript
104 lines
2.6 KiB
JavaScript
function removeNode(node, value) {
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if (node == null) return null;
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if (value < node.value) {
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node.left = removeNode(node.left, value);
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return node;
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} else if (value > node.value) {
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node.right = removeNode(node.right, value);
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return node;
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} else {
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//情况1：节点为叶节点（有零个子节点的节点）
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if(node.left == null && node.right == null) {
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node = null;
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return node;
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}
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//情况2：只有一个子节点的节点
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if (node.left == null) {
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node = node.right;
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return node;
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} else if(node.right == null) {
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node = node.left;
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return node;
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}
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//情况3：有两个子节点的节点
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// 先找到右边子树节点的最小值节点
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// 再用最小值节点的值更新当前节点的值
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// 最后删除右边子树最小值节点
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var findMinNode = function(node) {
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if (node) {
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while(node && node.left !== null) {
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node = node.left;
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}
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return node;
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}
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return null;
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}
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var aux = findMinNode(node.right);
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node.value = aux.value;
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node.right = removeNode(node.right, aux.value);
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return node;
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}
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}
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var root = {
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value: 11,
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left: {
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value: 7,
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left: {
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value: 5,
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left: {
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value: 3,
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left: null,
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right: null
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},
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right: {
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value: 6,
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left: null,
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right: null
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}
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},
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right: {
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value: 9,
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left: {
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value: 8,
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left: null,
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right: null
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},
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right: {
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value: 10,
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left: null,
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right: null
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}
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}
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},
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right: {
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value: 15,
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left: {
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value: 13,
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left: {
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value: 12,
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left: null,
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right: null
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},
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right: {
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value: 14,
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left: null,
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right: null
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}
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},
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right: {
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value: 20,
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left: {
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value: 18,
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left: null,
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right: null
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},
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right: {
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value: 25,
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left: null,
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right: null
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}
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}
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}
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};
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removeNode(root, 15);
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