There two methods to construct a heap from a unordered set of array. If a array has size n, it can be seen as a complete binary tree, in which the element indexed by i has its left children 2*i+1(if 2*i+1<n) and its right children 2*i+2(if 2*i+2<n),…
Introduction ------------ The Heap Only Tuple (HOT) feature eliminates redundant index entries and allows the re-use of space taken by DELETEd or obsoleted UPDATEd tuples without performing a table-wide vacuum. It does this by allowing single-page va…
堆(heap),是一种特殊的数据结构.之所以特殊,因为堆的形象化是一个棵完全二叉树,并且满足任意节点始终不大于(或者不小于)左右子节点(有别于二叉搜索树Binary Search Tree).其中,前者称为小顶堆(最小堆,堆顶为最小值),后者为大顶堆(最大堆,堆顶为最大值).然而更加特殊的是,通常使用数组去存储堆,而不是二叉树.关于完全二叉树,可以参见另一篇博文http://www.cnblogs.com/eudiwffe/p/6207196.html // Heap is a sepcial…
原题连接:https://pta.patest.cn/pta/test/1342/exam/4/question/27102 题目如下: According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list. Each iteration, insertion sort removes one element fr…
[Unity][Heap sort]用Unity动态演示堆排序的过程 How Heap Sort Works 最近做了一个用Unity3D动态演示堆排序过程的程序. I've made this app to show how heap sort works recently. 效果图(Demo) 一图抵千言. A picture paints a thousand words. 堆排序(Heap Sort) 堆排序总是建立这样一个二叉树:其父结点总大于其子结点. Step 1: The fir…