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Saving an Object (Data persistence)
...can serialize almost anything in python.
We start with a class…
Python 2.7.8 (default, Jul 13 2014, 02:29:54)
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pickle
>>...
What are some good resources for learning about Artificial Neural Networks? [closed]
...any notions that artificial neural networks have anything to do with the brain but for a passing similarity to networks of biological neurons. Learning biology won't help you effectively apply neural networks; learning linear algebra, calculus, and probability theory will. You should at the very lea...
How to launch an Activity from another Application in Android
...
If you don't know the main activity, then the package name can be used to launch the application.
Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.package.address");
if (launchIntent != null) {
startActivity(launchInte...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...虑下面的这么几个情况：
1）容灾：数据不丢、结点的Failover
2）数据的一致性：事务处理
3）性能：吞吐量 、 响应时间
前面说过，要解决数据不丢，只能通过数据冗余的方法，就算是数据分区，每个区也需要进行数据冗余处...
Why should I avoid multiple inheritance in C++?
...ly, it was done for bad reasons, and it will blow back in the face of the maintainer.
Summary
Consider composition of features, instead of inheritance
Be wary of the Diamond of Dread
Consider inheritance of multiple interfaces instead of objects
Sometimes, Multiple Inheritance is the right thing. I...
How to copy files from 'assets' folder to sdcard?
...ssetManager.list("");
} catch (IOException e) {
Log.e("tag", "Failed to get asset file list.", e);
}
if (files != null) for (String filename : files) {
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(filename);
...
Usage of __slots__?
...gs to __slots__.
To verify this, using the Anaconda distribution of Python 2.7 on Ubuntu Linux, with guppy.hpy (aka heapy) and sys.getsizeof, the size of a class instance without __slots__ declared, and nothing else, is 64 bytes. That does not include the __dict__. Thank you Python for lazy evaluati...
YouTube API to fetch all videos on a channel
...p;maxResults=20
After that you will receive a JSON with video ids and details, and you can construct your video URL like this:
http://www.youtube.com/watch?v={video_id_here}
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What is Scala's yield?
.....})))
This
for(x <- c; if cond) yield {...}
is translated on Scala 2.7 into
c.filter(x => cond).map(x => {...})
or, on Scala 2.8, into
c.withFilter(x => cond).map(x => {...})
with a fallback into the former if method withFilter is not available but filter is. Please see the...
Decreasing for loops in Python impossible?
... significant cost difference between step=-1 and reversed() in both Python 2.7 and 3.3. Also please note that this idiom is used in heapq.
– kojiro
Aug 26 '13 at 1:34
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