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MySql之on duplicate key update详解
在我们的日常开发中,你是否遇到过这种情景:查看某条记录是否存在,不存在的话创建一条新记录,存在的话更新某些字段。你的处理方式是不是就是按照下面这样?$result = mysql_query('select * from xxx where id = 1');$row = mysql_fetch_a...
分类:数据库   时间:2014-11-05 16:18:34    阅读次数:272
LeetCode[Linked List]: Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example, Given 1->2->3->3->4->4->5, return 1->2->5. Given 1...
分类:其他好文   时间:2014-11-04 22:55:40    阅读次数:300
[leetcode]Find Minimum in Rotated Sorted Array
问题描述: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. You may assume no duplicate exists ...
分类:其他好文   时间:2014-11-04 17:26:17    阅读次数:253
duplicate symbol _OBJC_IVAR_$_MenuViewGo.timer
报错:?duplicate?symbol?_OBJC_IVAR_$_XXXXX ?重复引用了?XXXXX?,找到并?delete-----》?remove?reference?就OK乐
分类:其他好文   时间:2014-11-03 17:55:17    阅读次数:186
Remove Duplicates from Sorted List II 移除有序链表中的重复项之二
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2->3-...
分类:其他好文   时间:2014-11-02 13:41:39    阅读次数:168
SVA(system verilog assertions)基础
1什么是断言:   断言就是在模拟过程中根据我们事先安排好的逻辑是不是发生了,如果发生断言成功,否则断言失败。 2断言的执行分为:预备(preponed)观察(observed)响应(reactive). 3断言的分类:并发断言(基于时钟)和即时断言(基于语义)。 4SVA(system Verilogassertions):块的建立: 序列:   Sequencename_of_se...
分类:其他好文   时间:2014-10-31 11:59:20    阅读次数:281
LeetCode:Find Minimum in Rotated Sorted Array
题目描述: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. You may assume no duplicate...
分类:其他好文   时间:2014-10-31 11:57:17    阅读次数:201
[Forward]Ten Caching Mistakes that Break your App
Caching large objects, duplicate objects, caching collections, live objects, thread unsafe caching and other common mistakes break your app instead of...
分类:移动开发   时间:2014-10-31 10:04:22    阅读次数:263
通过RMAN 异机克隆数据库
使用RMAN进行复制时,RMAN会连接目标数据库和辅助实例,如果使用了catalog备份的还会连接恢复目录。RMAN连接了目标数据库才能够访问其控制文件中记录的备份的详细信息,连接辅助实例才能够在辅助实例上分配一个或多个通道进程,9i开始会自动创建通道;要连接辅助实例就先要启动..
分类:数据库   时间:2014-10-29 19:33:38    阅读次数:299
Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2->3-...
分类:其他好文   时间:2014-10-29 16:49:45    阅读次数:220
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