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How do I daemonize an arbitrary script in unix?
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You can daemonize any executable in Unix by using nohup and the & operator:
nohup yourScript.sh script args&
The nohup command allows you to shut down your shell session without it killing your script, while the & places your script in t...
How exactly do Django content types work?
...t is a "compromise" of sorts to bypass some of the rigid fundamentals of a table oriented SQL system. Do not prematurely optimize your app! Django is best at getting out of your way so you can write the next generation application you have always wanted: use it's features to your advantage!
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App Launcher 应用启动器扩展：用于启动其他应用程序的强大工具，支持独立...
... ActionType Launcher 相关的字段。
属性表格 Properties Table
名称
类型
S
L
功能
默认值
ActionType
choice(仅设计器)
X
X
指定操作类型。可能的值：None、...
What is the significance of ProjectTypeGuids tag in the visual studio project file
...(for C# and VB.NET projects) and others have other purposes. The following table lists known project type Guids.
Project Type Description Project Type Guid
Windows (C#) {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
Windows (VB.NET) {F184...
Best practice using NSLocalizedString
...calizedString = [[NSBundle mainBundle] localizedStringForKey:key value:key table:nil];
// if (value == key) and comment is not nil -> returns comment
if([localizedString isEqualToString:key] && comment !=nil)
return comment;
return localizedString;
}
@end
3. Use i...
Different types of thread-safe Sets in Java
... like for HashMap/HashSet. There is a limited concurrency for writing (the table is partitioned, and write access will be synchronized on the needed partition), while read access is fully concurrent to itself and the writing threads (but might not yet see the results of the changes currently being w...
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
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Sometimes the system startup script that launched the command line executable specifies a flag --socket=path. This flag could override the my.cnf location, and that would result in a socket not being found where the my.cnf file indicates it should be. Then when you try to run the mysql command l...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...of different "types" in the same collection, so why not just put your two "tables" in the same collection. They would share the same _id space, and thus, would be guaranteed unique. Switching from "prospective" to "registered" would be a simple flipping of a field...
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How can I use interface as a C# generic type constraint?
...t. This is the default behavior of .NET. For me, this is completely unacceptable.
Prerequirements
We need to have a constraint mechanism, so for the lack of anything better... let's use an attribute. The attribute will be present on top of a generic constraint to check if it matches our conditions...
Difference between static and shared libraries?
...ing costs. The code is simply there." - yes and no... it's all in the executable image ready to be paged in if execution requires, but - starting from a situation where your program hasn't run recently enough to be in cache - with shared libraries it's possible (sometimes likely or certain) that the...