十年河东,十年河西,莫欺骚年穷...打错一个字哈.~_~ 接着上一篇博客,上一篇博客是=使用数据库结合LINQ构造的,为了方便理解,本篇采用泛型分组进行构造. 有兴趣的小虎斑可以参考上一篇博客:如何构造分层次的 Json 数据 本篇很简单,直接上代码 using Newtonsoft.Json; using System; using System.Collections.Generic; using System.ComponentModel; using System.Linq; using…
There is an apple tree outside of kaka's house. Every autumn, a lot of apples will grow in the tree. Kaka likes apple very much, so he has been carefully nurturing the big apple tree. The tree has N forks which are connected by branches. Kaka numbers…
Fenwick Tree, (also known as Binary Indexed Tree,二叉索引树), is a high-performance data structure to calculate the sum of elements from the beginning to the indexed in a array. It needs three functions and an array: Array sum; It stores the data of Fenwi…
树状数组又称芬威克树,概念上是树状,实际上是使用数组实现的,表现为一种隐式数据结构,balabala...详情请见:https://en.wikipedia.org/wiki/Fenwick_tree 其中`i += (i & -i)`的相当于求 $ 2^{n-1} , n \in 1,2,3... $,还可以写成`i += (i & (i ^ (i - 1)))`. code: #include <iostream> #define LSB(i) (i & -i) c…
先看看json返回的数据结构: 我需要遍历取出bookreno 与 title 加载到页面容器中去 首先我要取到 recommendedBookList 字典结构数据,然后遍历反射到相应对象的属性 主方法这样写: $(d.recommendedBookList).each(function(index,item){ //index指下标 //item指代对应元素内容 //this指代每一个元素对象 var bookno= item.bookrecno; var title = item…