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Complete Binary Search Tree
A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:The left subtree of a node contains only nodes w...
分类:其他好文   时间:2015-04-13 18:25:39    阅读次数:144
复制无向带环图
Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. OJ's undirected graph serialization: Nodes are labeled uniquely. We use # as a separator for each...
分类:其他好文   时间:2015-04-13 16:41:28    阅读次数:135
LinqToEntity模糊查询的方法选择
LinqToEntity针对oracle模糊查询方法:Contains() 转换出来的sql是 like 关键字方法:IndexOf() 转换出来的sql是instr() 函数like 和 instr() 方法对于模糊查询的效率 有时有很大的差异,使用时可根据需要选择
分类:其他好文   时间:2015-04-13 14:33:34    阅读次数:119
研究 研究而已 java和.net的HashSet对比
今天,应为工作问题,测试了一下C#和java同意的代码功能执行情况,发现一个问题。HashSet.contains 方法对比,在java下面性能居然没有c#的高。 1 private static final Logger log = Logger.getLogger(NewClass.cl...
分类:编程语言   时间:2015-04-12 17:27:07    阅读次数:200
LeetCode Customers Who Never Order
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything. Table: Customers. +----+-------+ | Id | Na...
分类:其他好文   时间:2015-04-12 14:52:06    阅读次数:124
Permutation Sequence
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie...
分类:其他好文   时间:2015-04-12 13:11:26    阅读次数:118
UVA - 11464 - Even Parity
11464 Even Parity We have a grid of size N × N. Each cell of the grid initially contains a zero(0) or a one(1). The parity of a cell is the number of 1s surrounding that cell. A cell is surrounded b...
分类:其他好文   时间:2015-04-12 09:15:39    阅读次数:143
[Android] TextSwitcher -- 做什么的
TextSwitcher的Java Doc是这样描述自己的: Specialized ViewSwitcher that contains only children of type TextView. A TextSwitcher is useful to animate a label on screen. Whenever setText(CharSequence) is called,...
分类:移动开发   时间:2015-04-12 00:06:15    阅读次数:202
IEnumerable和List有什么区别?(转)
如下IList接口可以使用更多的方法。比如你看一个集合是否包含相应实体,IEnumerable不行,而IList里有Contains,相应的实现了IList的可以添加,删除相应实体。而IEnumerable不行。但是这不是说IList就比IEnumerable好,就是因为IList实现的功能多,相对...
分类:编程语言   时间:2015-04-10 11:00:35    阅读次数:287
[LeetCode]Validate Binary Search Tree
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the...
分类:其他好文   时间:2015-04-09 23:54:16    阅读次数:304
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