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Fix remove() in binary search tree.

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krahets
2023-05-26 20:34:22 +08:00
parent ee716a2c23
commit b39e79be85
9 changed files with 111 additions and 50 deletions
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11
codes/swift/chapter_tree/binary_search_tree.swift
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@@ -123,10 +123,15 @@ class BinarySearchTree {
// 当子节点数量 = 0 / 1 时， child = null / 该子节点
let child = cur?.left != nil ? cur?.left : cur?.right
// 删除节点 cur
if pre?.left === cur {
pre?.left = child
if cur != root {
if pre?.left === cur {
pre?.left = child
} else {
pre?.right = child
}
} else {
pre?.right = child
// 若删除节点为根节点，则重新指定根节点
root = cur;
}
}
// 子节点数量 = 2