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Spring声明式事务配置中propagation各个值的意思
值 含义 REQUIRED 支持当前事务,如果当前没有事务,就新建一个事务。 SUPPORTS 支持当前事务,如果当前没有事务,就以非事务方式执行。 MANDATORY 支持当前事务,如果当前没有事务,就抛出异常。 REQUIRES_NEW 新建事务,如果当前存在事务,把当前事务挂起。 NOT_SU ...
分类:编程语言   时间:2016-08-10 22:30:57    阅读次数:154
[LeetCode] Insert Delete GetRandom O(1) - Duplicates allowed 常数时间内插入删除和获得随机数 - 允许重复
Design a data structure that supports all following operations in average O(1) time. Note: Duplicate elements are allowed. insert(val): Inserts an ite ...
分类:其他好文   时间:2016-08-10 12:41:32    阅读次数:126
【Leetcode】Insert Delete GetRandom O(1) - Duplicates allowed
题目链接:https://leetcode.com/problems/insert-delete-getrandom-o1-duplicates-allowed/ 题目: Design a data structure that supports all following operations in average O(1) time. Note: Duplicate elemen...
分类:其他好文   时间:2016-08-09 23:26:38    阅读次数:570
LeetCode-Design Phone Directory
Design a Phone Directory which supports the following operations: Example: Analysis: We record the last used number and also maintain a hashset to rec ...
分类:其他好文   时间:2016-08-08 14:34:39    阅读次数:163
LeetCode 155. Min Stack
这个题目的关键是要有一个最小值的私有变量,在入栈和出栈时检查一下最小值是否变化即可,就能实现返回最小值是在常数时间内 不过题目的注释中是有错误的,因为用new得到的是一个指针,不能用.运算符而是用->运算符 Design a stack that supports push, pop, top, a ...
分类:其他好文   时间:2016-08-07 21:36:54    阅读次数:151
【Leetcode】Insert Delete GetRandom O(1)
题目链接:https://leetcode.com/problems/insert-delete-getrandom-o1/ 题目: Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to...
分类:其他好文   时间:2016-08-07 09:43:15    阅读次数:153
oracle服务起不来以及无法监听问题解决
改问题是在搭建起一个很早之前的数据库的时候碰见的,虽然这个问题网上已经有很多相关的帖子,但因最近碰见多次这样的问题,特此简单记录: 1.最开始碰见的问题是:The listener supports no services 之前的记录没有存,借用其他贴相似错误: (DESCRIPTION=(ADDR ...
分类:数据库   时间:2016-08-06 20:31:52    阅读次数:150
Mercedes Smart Key Teach-in support k-line Smart (1998-2002)
Disclaimer: Smart Key Teach-in only supports Mercedes-Benz Smart (1998~2002) with K-line protocol. Smart Key Teach-in support ECU type as follows: MB  ...
分类:其他好文   时间:2016-08-06 17:34:35    阅读次数:111
Spring 中出现Element : property Bean definitions can have zero or more properties. Property elements correspond to JavaBean setter methods exposed by the bean classes. Spring supports primitives, refer
在这个ApplicationContext.xml文件中出现 如下报错 Element : property Bean definitions can have zero or more properties. Property elements correspond to JavaBean set ...
分类:编程语言   时间:2016-08-06 12:36:54    阅读次数:328
【leetcode】Insert Delete GetRandom O(1)
Insert Delete GetRandom O(1)问题描述Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): R...
分类:其他好文   时间:2016-08-05 16:13:17    阅读次数:317
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