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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...方式
因都在内存操作，所以逻辑的操作非常快，减少了CPU的切换开销，所以为单线程的模式（逻辑处理线程和主线程是一个）。
reactor模式，实现自己的多路复用NIO机制（epoll，select，kqueue等）
单线程处理多任务
数据结构
ha...
What is the best open XML parser for C++? [duplicate]
...ments, computer games, or any other applications where available memory or CPU processing power comes at a premium. RapidXML is licensed under Boost Software License and its source code is freely available.
Features
Parsing speed (including DOM tree
building) approaching speed of
strlen function ...
Download a file with Android, and showing the progress in a ProgressDialog
...tected void onPreExecute() {
super.onPreExecute();
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeL...
Matplotlib connect scatterplot points with line - Python
...d Nov 21 '13 at 21:24
Hannes OvrénHannes Ovrén
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...
No == operator found while comparing structs in C++
...zarre you have to implement them all yourself.
– André
Sep 30 '15 at 13:18
@André: more often a manually written int...
Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
... answered May 4 '16 at 12:35
GézaGéza
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...
Multiple Updates in MySQL
...afe code for the variant with case statement ?
– François M.
Jul 21 '15 at 16:44
1
I find the in...
How to get the first column of a pandas DataFrame as a Series?
...he column's header has e.g. spaces in it.
– Jean-François Corbett
Jan 24 '18 at 12:54
add a comment
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Format floats with standard json module
... do anything to floats. However loads does. So if you don't mind the extra CPU load, you could throw it through the encoder/decoder/encoder and get the right result:
>>> json.dumps(json.loads(json.dumps([.333333333333, .432432]), parse_float=lambda x: round(float(x), 3)))
'[0.333, 0.432]'
...
Why use symbols as hash keys in Ruby?
...Symbols are garbage collected in Ruby 2.2
– Marc-André Lafortune
Jan 20 '15 at 18:28
2
Great ans...