mirror of
https://github.com/linghuam/boutique-books.git
synced 2024-11-23 10:04:58 +00:00
104 lines
2.6 KiB
JavaScript
104 lines
2.6 KiB
JavaScript
function removeNode(node, value) {
|
||
if (node == null) return null;
|
||
if (value < node.value) {
|
||
node.left = removeNode(node.left, value);
|
||
return node;
|
||
} else if (value > node.value) {
|
||
node.right = removeNode(node.right, value);
|
||
return node;
|
||
} else {
|
||
//情况1：节点为叶节点（有零个子节点的节点）
|
||
if(node.left == null && node.right == null) {
|
||
node = null;
|
||
return node;
|
||
}
|
||
//情况2：只有一个子节点的节点
|
||
if (node.left == null) {
|
||
node = node.right;
|
||
return node;
|
||
} else if(node.right == null) {
|
||
node = node.left;
|
||
return node;
|
||
}
|
||
//情况3：有两个子节点的节点
|
||
// 先找到右边子树节点的最小值节点
|
||
// 再用最小值节点的值更新当前节点的值
|
||
// 最后删除右边子树最小值节点
|
||
var findMinNode = function(node) {
|
||
if (node) {
|
||
while(node && node.left !== null) {
|
||
node = node.left;
|
||
}
|
||
return node;
|
||
}
|
||
return null;
|
||
}
|
||
var aux = findMinNode(node.right);
|
||
node.value = aux.value;
|
||
node.right = removeNode(node.right, aux.value);
|
||
return node;
|
||
}
|
||
}
|
||
var root = {
|
||
value: 11,
|
||
left: {
|
||
value: 7,
|
||
left: {
|
||
value: 5,
|
||
left: {
|
||
value: 3,
|
||
left: null,
|
||
right: null
|
||
},
|
||
right: {
|
||
value: 6,
|
||
left: null,
|
||
right: null
|
||
}
|
||
},
|
||
right: {
|
||
value: 9,
|
||
left: {
|
||
value: 8,
|
||
left: null,
|
||
right: null
|
||
},
|
||
right: {
|
||
value: 10,
|
||
left: null,
|
||
right: null
|
||
}
|
||
}
|
||
},
|
||
right: {
|
||
value: 15,
|
||
left: {
|
||
value: 13,
|
||
left: {
|
||
value: 12,
|
||
left: null,
|
||
right: null
|
||
},
|
||
right: {
|
||
value: 14,
|
||
left: null,
|
||
right: null
|
||
}
|
||
},
|
||
right: {
|
||
value: 20,
|
||
left: {
|
||
value: 18,
|
||
left: null,
|
||
right: null
|
||
},
|
||
right: {
|
||
value: 25,
|
||
left: null,
|
||
right: null
|
||
}
|
||
}
|
||
}
|
||
};
|
||
removeNode(root, 15);
|