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The text was updated successfully, but these errors were encountered:
var levelOrder = function(root) { if(!root) return []; let res = []; let queue = [root]; while(queue.length){ //记录当前层级节点数 let len = queue.length; //存放每一层的节点 let curLevel = []; for(let i = 0; i < len; i++){ let node = queue.shift(); curLevel.push(node.val); //存入下一层的节点 node.left && queue.push(node.left); node.right && queue.push(node.right); } res.push(curLevel); } return res; };
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The text was updated successfully, but these errors were encountered: