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HashMap二三事
先看看hashmap在整个Collection中的位置 HashMap中存储数据的结构是 /** * The table, resized as necessary. Length MUST Always be a power of two. */ transient Entry[] table; 上面的英文就不用说了。 原来基础的存储结构式En...
分类:其他好文   时间:2014-10-24 14:42:43    阅读次数:223
跨时钟域接口转换电路
1 module handshake( 2 input clka,wra_n,da,clkb,rst, 3 output reg [7:0] db, 4 output reg wrb_n 5 ); 6 7 reg ack,temp,req1; 8 reg [7:0] data; 9 always.....
分类:其他好文   时间:2014-10-23 15:45:20    阅读次数:256
Why NHibernate updates DB on commit of read-only transaction
http://www.zvolkov.com/clog/2009/07/09/why-nhibernate-updates-db-on-commit-of-read-only-transaction/Always be careful with NULLable fields whenever yo...
分类:数据库   时间:2014-10-23 12:07:34    阅读次数:272
HDOJ 5071 Chat 模拟
大模拟: 1》saygoodbye要先对 always on top 的人说 2》对没有说过话的不要说good bye 3》用long long Chat Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Total Submission(s...
分类:其他好文   时间:2014-10-23 06:51:10    阅读次数:163
PHP中include路径修改
1.__FILE____FILE__ always equals to the real path of a php script regardless whether it's included.__FILE__ helps you specify the file to include usin...
分类:Web程序   时间:2014-10-22 20:18:45    阅读次数:242
Merge compare columns when null
Key words: merge compare columnswhen we contact merge sql in ETL,When we update some columns we should compare the value change or not.We always write...
分类:其他好文   时间:2014-10-22 14:24:51    阅读次数:160
LeetCode 146 LRU Cache
Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if ...
分类:系统相关   时间:2014-10-22 12:56:02    阅读次数:274
FSM从一段到三段详解
一段式:将整个状态机写到1个always模块里,在该模块中既描述状态转移,又描述状态的输入和输出。(always用时序逻辑也就非阻塞赋值)解释:无须解释特点:一段式描述方法不符合将时序和组合逻辑分开描述的Coding Style(代码风格),而且代码冗长、不清晰,不利于附加约束,不利于综合器和布局布...
分类:其他好文   时间:2014-10-21 19:11:23    阅读次数:202
如果回到十八岁,我要对自己说......
I like to joke that I am who I am today because I did everything wrong in my 20's. I've always been fearless, and it often got me in trouble. I wasn't afraid to start a business, borrow a bunch of m...
分类:其他好文   时间:2014-10-20 23:27:46    阅读次数:577
HDU 3639 Hawk-and-Chicken(Tarjan缩点+反向DFS)
Problem Description Kids in kindergarten enjoy playing a game called Hawk-and-Chicken. But there always exists a big problem: every kid in this game want to play the role of Hawk.  So the teacher ...
分类:其他好文   时间:2014-10-18 22:26:11    阅读次数:291
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