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How to write a scalable Tcp/Ip based server
...ctions (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
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How do I write unit tests in PHP? [closed]
I've read everywhere about how great they are, but for some reason I can't seem to figure out how exactly I'm supposed to test something. Could someone perhaps post a piece of example code and how they would test it? If it's not too much trouble :)
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Why does git-rebase give me merge conflicts when all I'm doing is squashing commits?
... of which were a lot of trial-and-error. We want to clean up these commits by squashing many down into a single commit. Naturally, git-rebase seems the way to go. My problem is that it ends up with merge conflicts, and these conflicts are not easy to resolve. I don't understand why there should be a...
Given an RGB value, how do I create a tint (or shade)?
Given an RGB value, like 168, 0, 255 , how do I create tints (make it lighter) and shades (make it darker) of the color?
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Smarty中date_format日期格式化详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...%a - 当前区域星期几的简写
%A - 当前区域星期几的全称
%b - 当前区域月份的简写
%B - 当前区域月份的全称
%c - 当前区域首选的日期时间表达
%C - 世纪值（年份除以 100 后取整，范围从 00 到 99）
%d - 月份中的第几天，十进制数...
mongodb: insert if not exists
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Sounds like you want to do an "upsert". MongoDB has built-in support for this. Pass an extra parameter to your update() call: {upsert:true}. For example:
key = {'key':'value'}
data = {'key2':'value2', 'key3':'value3'};
coll.update(key, data, upsert=True); #In python ...
How to create a generic array in Java?
...that mean?
Checked: strong typing. GenSet knows explicitly what type of objects it contains (i.e. its constructor was explicitly called with a Class<E> argument, and methods will throw an exception when they are passed arguments that are not of type E. See Collections.checkedCollection.
-&g...
Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
27
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explicit casting from super class to subclass
...ssignment Dog dog = (Dog) animal; does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
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