...o be updated. With large amounts of data this can be a sizable performance win. This is also very popular in industries that have very strict auditing rules; Perforce admins can easily track and log which developers have synced which files. For more information on the full power of Perforce workspa...

...query optimiser will choose a table scan only when one or more of the following holds. There are fewer than 200 rows in the relation (in this case a scan will be cheaper) There are no suitable indexes on the join columns (if it's meaningful to join on these columns then why aren't they indexed? fi...

...that I am implementing an auth+auth system for CodeIgniter, and so far I'm winning (so to speak). But I've run into a pretty non-trivial challenge (one that most auth libraries miss entirely, but I insist on handling it properly): how to deal intelligently with large-scale, distributed, variable-us...

...ite important. Workflows: Larry Osterman (a Microsoft dev working on the Windows team) has a great blog post about the workflow they employ at the Windows team. Most notably they have: A clean, high quality code only trunk (master repo) All development happens on feature branches Feature teams h...

...正则表达式就是记录文本规则的代码。 很可能你使用过Windows/Dos下用于文件查找的通配符(wildcard)，也就是*和?。如果你想查找某个目录下的所有的Word文档的话，你会搜索*.doc。在这里，*会被解释成任意的字符串。和通配符类似...

...search against database. Everything looks great in theory, but user's need wins above theory. Again: An entity with 20+ fields is incorrectly modeled. It's a GOD entity. Break it down. I'm not arguing that IQueryable wasn't made for quering. I'm saying that it's not right for an abstraction lay...

...ata, but only one is capable of reclaiming it. Disk I/O dumping: A clear win for redis since it does this by default and has very configurable persistence. Memcached has no mechanisms for dumping to disk without 3rd party tools. Scaling: Both give you tons of headroom before you need more than a s...

...ications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation...

...some web service is handing you an integer in string format), you'd use Int32.Parse(). If you're collecting input from a user, you'd generally use Int32.TryParse(), since it allows you more fine-grained control over the situation when the user enters invalid input. Convert.ToInt32() takes an objec...

... On Linux, Android SDK platform-tools package containing adb used to be 32bit. It worked fine on 32bit systems. But on 64bit systems you need to manually install the IA32 library. For Debian based distributions try this: sudo apt-get install libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5 But...