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How does tuple comparison work in Python?
I have been reading the Core Python programming book, and the author shows an example like:
4 Answers
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What's onCreate(Bundle savedInstanceState)
...it can be passed back to onCreate if the activity needs to be recreated (e.g., orientation change) so that you don't lose this prior information. If no data was supplied, savedInstanceState is null.
... you
should use the onPause() method to write any persistent data (such as
user edits) to ...
The order of keys in dictionaries
...ct (requires Python 2.7) or higher.
Also, note that OrderedDict({'a': 1, 'b':2, 'c':3}) won't work since the dict you create with {...} has already forgotten the order of the elements. Instead, you want to use OrderedDict([('a', 1), ('b', 2), ('c', 3)]).
As mentioned in the documentation, for vers...
Why is String immutable in Java?
I was asked in an interview why String is immutable
12 Answers
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Explaining Python's '__enter__' and '__exit__'
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Using these magic methods (__enter__, __exit__) allows you to implement objects which can be used easily with the with statement.
The idea is that it makes it easy to build code which needs some 'cleandown' code executed (think of it as a try-finally block). Some more explanation here.
A useful...
Does python have an equivalent to Java Class.forName()?
I have the need to take a string argument and create an object of the class named in that string in Python. In Java, I would use Class.forName().newInstance() . Is there an equivalent in Python?
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SET NAMES utf8 in MySQL?
I often see something similar to this below in PHP scripts using MySQL
8 Answers
8
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How can I visualize per-character differences in a unified diff file?
Say I get a patch created with git format-patch . The file is basically a unified diff with some metadata. If I open the file in Vim, I can see which lines have been modified, but I cannot see which characters in the changed lines differ. Does anyone know a way (in Vim, or some other free softwar...
z-index not working with fixed positioning
I have a div with default positioning (i.e. position:static ) and a div with a fixed position.
8 Answers
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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...状态机的实现)、实际数据的编码(图像如何被序列化，RGB？CMYK?)等等。
第3点表达了这样一个事实：即使存在两个非常相同的（例如两家公司里的）商务逻辑部署，它们仍然形成了两个拓扑，除非它们...