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Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
...their #define values.
Importantly, never test booleans using a character comparison -- it's not only risky because someVar could be assigned a non-zero value which is not YES, but, in my opinion more importantly, it fails to express the intent correctly:
if(someVar==YES) { ... } // don't do this!...
Why is it not advisable to have the database and web server on the same machine?
... be on separate machines. Is this just to make sure that if one server is compromised, both systems aren't accessible? Do the security concerns outweigh the complexity of two servers (extra cost, dedicated network connection between the two, more maintenance, etc.), especially for a small applicat...
How do I get a TextBox to only accept numeric input in WPF?
...(String));
if (!IsTextAllowed(text))
{
e.CancelCommand();
}
}
else
{
e.CancelCommand();
}
}
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What is __future__ in Python used for and how/when to use it, and how it works
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With __future__ module's inclusion, you can slowly be accustomed to incompatible changes or to such ones introducing new keywords.
E.g., for using context managers, you had to do from __future__ import with_statement in 2.5, as the with keyword was new and shouldn't be used as variable names a...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...数据库
user admin
#串联路由服务器与分配副本集1
db.runCommand( { addshard : "shard1/192.168.0.136:22001,192.168.0.137:22001,192.168.0.138:22001"});
如里shard是单台服务器，用 db.runCommand( { addshard : “[: ]” } )这样的命令加入，如果shard是副本集，...
How to find the nearest parent of a Git branch?
Let's say I have the following local repository with a commit tree like this:
20 Answers
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What does a tilde do when it precedes an expression?
... 0000 0000 0000 0001
If it were a negative number, it'd be stored in 2's complement: invert all bits and add 1.
...and then flips all its bits...
1111 1111 1111 1111 1111 1111 1111 1110
So what is the use of it, then? When might one ever use it?
It has a quite a few uses. If you're writin...
Why aren't Java Collections remove methods generic?
...d() can take a typed parameter but remove() can't is still a bit beyond my comprehension. Josh Bloch would be the definitive reference for Collections questions. It might be all I get without trying to make a similar collection implementation and see for myself. :( Thanks.
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Hibernate Annotations - Which is better, field or property access?
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OpenLayers vs Google Maps? [closed]
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Before starting any kind of coding, here are a couple of questions that come to my mind,
11 Answers
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