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Do NSUserDefaults persist through an Update to an app in the Appstore?
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They are usually not reset unless the user deletes the app. For basic data, NSUserDefaults is the best way to save data such as preferences, dates, strings etc. If you are looking to save images and files, the file system is a better bet...
Get the current git hash in a Python script
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git describe --always will fallback to the last commit if no tags are found
– Leonardo
Mar 6 '15 at 16:38
5
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Difference between ProcessBuilder and Runtime.exec()
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answered Jul 28 '11 at 9:18
Luke WoodwardLuke Woodward
53.2k1313 gold badges7373 silver badges9797 bronze badges
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Keyboard Interrupts with python's multiprocessing Pool
...s to set up the worker processes to ignore SIGINT altogether, and confine all the cleanup code to the parent process. This fixes the problem for both idle and busy worker processes, and requires no error handling code in your child processes.
import signal
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def init_worker():
signal.sign...
When do I use fabs and when is it sufficient to use std::abs?
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In C++, it's always sufficient to use std::abs; it's overloaded for all the numerical types.
In C, abs only works on integers, and you need fabs for floating point values. These are available in C++ (along with all of the C library), but there's no need to use them.
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Where is Vagrant saving changes to the VM?
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113
Vagrant imports the base box which is located at ~/.vagrant.d/boxes/, like you said.
This is w...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
boost多索引容器multi_index_container实战boost多索引容器multi_index_container用法详解、性能测试等。目录：
boost多索引容器multi_index_container详解
boost多索引容器multi_index_container架构图
boost多索引容器multi_index_container性能测试
原文地...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...思义，当程序运行到断点处时会暂停运行。比如断点打在11行，那么程序就会停在11行（注意：程序只运行到了前10行，第11行其实还没有被执行！！！）。只要在代码行旁边点击，就能添加一个断点，再次点击，就能让断点不可...
Sphinx autodoc is not automatic enough
...for modules project.module1 and project.module2 will be generated automatically and placed into _autosummary directory.
PROJECT
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.. toctree::
.. autosummary::
:toctree: _autosummary
project.module1
project.module2
By default autosummary will generate only very short summaries fo...