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Java for LeetCode 102 Binary Tree Level Order Traversal
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree {3...
分类:编程语言   时间:2015-05-23 09:55:21    阅读次数:126
LeetCode【2】. Add Two Numbers--java实现
第二道题 Add Two Numbers   如下:         You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a singl...
分类:编程语言   时间:2015-05-23 08:50:29    阅读次数:190
PLSQL配置介绍
PLSQL配置简介,优化来自为知笔记(Wiz)附件列表s=selectf=FROMw=WHEREsf=SELECT * FROMdf=DELETE FROMsc=SELECT COUNT(*) FROMob=ORDER BYgb= group by
分类:数据库   时间:2015-05-22 13:10:58    阅读次数:147
oracle 转置实现
下面是3种方法方法1:SYS_CONNECT_BY_PATH , ROW_NUMBER() OVER(PARTITION BY .. ORDER BY ..) , START WITH , CONNECT BY PRIOR 组合使用方法2:wmsys.wm_concat方法3:listagg(ora...
分类:数据库   时间:2015-05-22 11:29:59    阅读次数:343
What does the distance attribute in DMatches mean?
In this context, a feature is a point of interest on the image. In order to compare features, you "describe" them using a feature detector. Each feature is then associated to a descriptor. When you ...
分类:其他好文   时间:2015-05-21 22:41:59    阅读次数:487
thinkphp中try catch的运用
1 public function doedit_set(){ 2 $info=$this->_post("info"); 3 $id=$this->_post("id");//dump($info);exit(); 4 $user=DD("Order.OrderPac...
分类:Web程序   时间:2015-05-21 21:59:58    阅读次数:271
抽奖项目小计_1.数据库随机取数
1 select top 1 * from table2 where something3 order by newid()每行增加newid(),然后排序取top 1大数据随机时使用SELECT * FROM Table1 WHERE (ABS(CAST( (BINARY_CHECKSUM(...
分类:数据库   时间:2015-05-21 17:20:34    阅读次数:171
【牛腩新闻发布系统】——分页其实很简单
with temptbl as ( select ROW_NUMBER () over (order by id desc )as 行号,* from news ) select * from temptbl where 行号 between 9 and 16...
分类:其他好文   时间:2015-05-21 15:34:58    阅读次数:135
SQL分组取每组前一(或几)条记录(排名)
mysql分组取每组前几条记录(排名) 附group by与order by的研究http://www.jb51.net/article/31590.htm--按某一字段分组取最大(小)值所在行的数据代码如下:/* 数据如下: name val memo a 2 a2(a的第二个值) a 1 a1-...
分类:数据库   时间:2015-05-21 10:40:29    阅读次数:242
【Leetcode】【Medium】Binary Tree Zigzag Level Order Traversal
Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and al...
分类:其他好文   时间:2015-05-21 10:28:55    阅读次数:159
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