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Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?
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FWIW, Proguard will transform enums into ints by default.
– Nacho Coloma
Sep 23 '15 at 9:21
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What is the best way to ensure only one instance of a Bash script is running? [duplicate]
...rplate (originally available at my wiki page, nowadays available as gist). Transforming that into one-instance-per-user is trivial. Using it you can also easily write scripts for other scenarios requiring some locking or synchronization.
Here is the mentioned boilerplate for your convenience.
#!/b...
Does Python support multithreading? Can it speed up execution time?
...Python script from within a Python GUI, and calling multiple PIL (eg Image.transform()) and numpy (eg numpy.array()) operations with threads. And you provided some more examples in your comment such as using multiple threads to read files (eg f.read()?). I know an exhaustive list isnt possible, just...
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 星期一 23:48:18 CST
2.2配置yum 阿里源
1．卸载自带的源
rpm -aq | grep yum | xargs rpm -e --nodeps
安装阿里源
rpm -ivh http://mirrors.aliyun.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh http://mirrors.aliyun.com/centos/6/os/x8...
Purpose of memory alignment
...ent that you can read at this IBM article.
A computer's primary use is to transform data. Modern memory architectures and technologies have been optimized over decades to facilitate getting more data, in, out, and between more and faster execution units–in a highly reliable way.
Bonus: Caches
A...
Java 7 language features with Android
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Quote from dalvikvm.com:
dx, included in the Android SDK, transforms the Java Class files of Java classes compiled by a regular Java compiler into another class file format (the .dex format)
That means, the .java source file does not matter, it's only the .class bytecode.
As far ...
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
... SQL-89 versus SQL-92 style joins. One can assume that most RDBMS engines transform the syntax into an internal representation before optimizing or executing the query, so the human-readable syntax makes no difference.
I also try to evangelize the SQL-92 syntax. Sixteen years after it was approve...
C++ valarray vs. vector
...ces_from_mean;
differences_from_mean.reserve(original_values.size());
std::transform(original_values.begin(), original_values.end(), std::back_inserter(differences_from_mean), std::bind1st(std::minus<double>(), mean));
Today I would certainly write that differently. If nothing else, I would...
How do you make a web application in Clojure? [closed]
...id not mention is that everything is data, so it is much easier to compose/transform/inspect/generate compared to macros like in Compojure.
– nha
Jul 7 '17 at 8:54
add a comme...
Is there a Java equivalent to C#'s 'yield' keyword?
...ield
observer.onComplete(); // finish
}
}
Observables can be transformed into iterators so you can even use them in more traditional for loops. Also RXJava gives you really powerful tools, but if you only need something simple then maybe this would be an overkill.
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