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Delphi Variant oleVariant
The OleVariant type exists on both the Windows and Linux platforms. The main difference between Variant and OleVariant is that Variant can contain dat...
分类:其他好文   时间:2014-08-29 17:53:58    阅读次数:201
POJ3080
Blue Jeans Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12295   Accepted: 5337 Description The Genographic Project is a research partnership between IBM and...
分类:其他好文   时间:2014-08-29 16:11:38    阅读次数:229
SQL语句优化介绍
1, 对查询进行优化,应尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引 2,应尽量避免在 where 子句中对字段进行 null 值判断,创建表时NULL是默认值,但大多数时候应该使用NOT NULL,或者使用一个特殊的值,如0,-1作为默  认值。 3,应尽量避免在 where 子句中使用!=或,>=,BETWEEN,IN,以及某些时候的LIKE。 ...
分类:数据库   时间:2014-08-29 07:17:47    阅读次数:308
zoj 1456 Minimum Transport Cost (Floyd+路径记录)
Minimum Transport Cost Time Limit: 2 Seconds      Memory Limit: 65536 KB These are N cities in Spring country. Between each pair of cities there may be one transportation track or none. Now ther...
分类:其他好文   时间:2014-08-27 13:07:27    阅读次数:235
chrome 浏览器 开发者工具 性能检测 参数解释
Sending is time spent uploading the data/request to the server. It occurs between blocking and waiting. For example, if I post back an ASPX page this ...
分类:其他好文   时间:2014-08-27 10:33:57    阅读次数:285
The different between app server and web server
web server: handles http requestapp server: handle the business logic of the application1) web serverAWeb server mainly deals with sending HTML for di...
分类:移动开发   时间:2014-08-27 08:09:57    阅读次数:255
ZOJ - 1136 Multiple (同余+BFS)
Description a program that, given a natural number N between 0 and 4999 (inclusively), and M distinct decimal digits X1,X2..XM (at least one), finds the smallest strictly positive multiple of N that ...
分类:其他好文   时间:2014-08-26 21:34:06    阅读次数:342
POJ - 2252 Frogger(Dijkstra变形题)
题意: 题目撰写者的英语真是艰难晦涩,看了别人题解,才知道这题题意。 两个forger 一个froger 要蹦到另外一个froger处,他们的最短距离是这样定义的 : The frog distance (humans also call it minimax distance) between t...
分类:其他好文   时间:2014-08-26 19:02:16    阅读次数:232
HDU4974:A simple water problem
Problem Description Dragon is watching competitions on TV. Every competition is held between two competitors, and surely Dragon's favorite. After each competition he will give a score of either 0 o...
分类:其他好文   时间:2014-08-26 15:39:06    阅读次数:181
What's the difference between dist-packages and site-packages
今天试装了sparse工具包spams,由于需要手动安装,安装后看到/usr/local/lib/pythonx.y/ 下有两个文件夹:dist-packages, site-packages。这些里面装得都是python的第三方库,那么它们的区别是什么呢?以下是stackoverflow里的原问题...
分类:其他好文   时间:2014-08-24 20:40:22    阅读次数:219
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