这期内容当中小编将会给大家带来有关JavaScript中怎么构建一个avl树，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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function Node(value) { this.value = value; this.left = this.right = null; this.height = 0;}
function height(node) { return node ? node.height : 0;}
function rotateLeft(node) { const right = node.right; node.right = right.left; right.left = node; node.height = Math.max(height(node.left, node.right)) + 1; right.height = Math.max(height(right.left, right.right)) + 1; return right;}
function rotateRight(node) { const left = node.left; node.left = left.right; left.right = node; node.height = Math.max(height(node.left, node.right)) + 1; left.height = Math.max(height(left.left, left.right)) + 1; return left;}
function rotateLeftRight(node) { node.left = rotateLeft(node.left); return rotateRight(node);}
function rotateRightLeft(node) { node.right = rotateRight(node.right); return rotateLeft(node);}
function avlTreeInsert(node, value) {
if (!node) { node = new Node(value); } else if (value > node.value) { node.right = avlTreeInsert(node.right, value); if (height(node.right) - height(node.left) == 2) { if (value > node.right.value) { node = rotateLeft(node); } else { node = rotateRightLeft(node); } } } else if (value < node.value){ node.left = avlTreeInsert(node.left, value); if (height(node.right) - height(node.left) == 2) { if (value > node.left.value) { node = rotateRight(node); } else { node = rotateLeftRight(node); } } } node.height = Math.max(height(node.right), height(node.left)) + 1; return node;
}
(function test() { let i = 0; let data = []; while(i < 100) { data.push(i++); } i = 0; let root; while(i < data.length) { root = avlTreeInsert(root, data[i++]); } const queue = [root]; let current; while(current = queue.shift()) { console.log(current.value, height(current.right) - height(current.left)); queue.push(current.right); queue.push(current.left); } console.log(root); console.log(find(root ,99))})();
function find(node, value) { if (!node) { return null; } if (node.value === value) { return node; } return find(node.value > value ? node.left : node.right, value);}
上述就是小编为大家分享的JavaScript中怎么构建一个avl树了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
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