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```javascript var obj = { '2': 3, '3': 4, 'length': 2, 'splice': Array.prototype.splice, 'push': Array.prototype.push } obj.push(1) obj.push(2) console.log(obj) ``` node环境中运行结果： ```javascript { '2': 1, '3': 2, length: 4, splice:...
大顶堆+小顶堆 ```javascript const defaultCmp = (x, y) => x > y; // 默认是大顶堆 const swap = (arr, i, j) => ([arr[i], arr[j]] = [arr[j], arr[i]]); class Heap { /** *...