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Mysql 日期类型比较 TIMESTAMPDIFF
在数据库查询中,经常遇到计算2个日期相差值,SQL提供一个非常有用的函数:TIMESTAMPDIFFT。 基本语法:TIMESTAMPDIFF(interval,datetime_expr1,datetime_expr2) 其中,interval的取值可以为:SECOND, MINUTE...
分类:数据库   时间:2015-12-22 17:44:14    阅读次数:1606
UML建模类图
1、UML面向对象建模过程思路first:通过需求分析,熟悉业务流程,可画出BPMN或者UML活动图second:画出用例图third:分析用例图找出确定的类以及相关类,以及参与者类;创建这些类的关联,画出初始类图;将有相同功能的类提取父类,形成继承或接口;类加关联多重性。-----上面三点是业务过...
分类:其他好文   时间:2015-12-21 18:08:25    阅读次数:176
present半透明UIViewController
present一个半透明的UIViewController,跟add个view差不多的意思,一般会遇到的问题是跳转到下一个页面加载完背景色又变回去了,没有半透明的效果,加上一句代码就好了。1,present 一个UIViewControllerSecondViewController *second...
分类:其他好文   时间:2015-12-21 15:55:09    阅读次数:127
[LeetCode][JavaScript]Bulb Switcher
Bulb SwitcherThere arenbulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you to...
分类:编程语言   时间:2015-12-20 17:23:11    阅读次数:152
【LeetCode从零单刷】Bulb Switcher
题目: There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every third bulb (turning on if it's off or turni...
分类:其他好文   时间:2015-12-20 07:10:34    阅读次数:162
UVA - 10883 Supermean
DescriptionProblem FSupermeanTime Limit: 2 second"I have not failed. I've just found 10,000 ways that won't work."Thomas EdisonDo you know how to comp...
分类:其他好文   时间:2015-12-13 16:59:13    阅读次数:189
Winter(bfs&&dfs)
1084 - WinterPDF (English)StatisticsForumTime Limit:2 second(s)Memory Limit:32 MBWinter is coming. In a land far away,Nmen are spending the nights in ...
分类:Windows程序   时间:2015-12-12 12:31:25    阅读次数:304
Just another Robbery(背包)
1079 - Just another RobberyPDF (English)StatisticsForumTime Limit:4 second(s)Memory Limit:32 MBAs Harry Potter series is over, Harry has no job. Since...
分类:其他好文   时间:2015-12-10 23:51:39    阅读次数:247
javascript 计算倒计时
function timeDown(second) { var month = '', day = '', hour = '', minute = ''; if (second >= 86400 * 30) { month = Math.fl...
分类:编程语言   时间:2015-12-08 18:08:12    阅读次数:182
light oj 1214 - Large Division
1214 - Large DivisionPDF (English)StatisticsForumTime Limit:1 second(s)Memory Limit:32 MBGiven two integers,aandb, you should check whetherais divisib...
分类:其他好文   时间:2015-12-03 23:26:47    阅读次数:384
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