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Django - how to create a file and save it to a model's FileField?
Here's my model. What I want to do is generate a new file and overwrite the existing one whenever a model instance is saved:
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What is the EAFP principle in Python?
...mmon Python coding style assumes the existence of valid keys or attributes and catches exceptions if the assumption proves false. This clean and fast style is characterized by the presence of many try and except statements. The technique contrasts with the LBYL style common to many other languages s...
Alarm Manager Example
... until the phone turns off.
Add to Manifest.xml:
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<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
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<receiver android:process=":remote" android:name=".Alarm"></receiver>
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Code in your class:
package yourPackage;
import android.app....
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...为 real-address mode，关于实模式请详见文章：http://www.mouseos.com/arch/001.html
processor 执行的第一条指针在 0xFFFFFFF0 处，这个地址经过 North Bridge（北桥）和 South ridge（南桥）芯片配合解码，最终会访问到固化的 ROM 块，同时，经过别名...
Why is char[] preferred over String for passwords?
...method. Similarly, I have come across a suggestion not to use String to handle passwords.
17 Answers
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Is it smart to replace boost::thread and boost::mutex with c++11 equivalents?
... is that my genius project manager thinks that boost is another dependency and that it is horrible because "you depend on it"(I tried explaining the quality of boost, then gave up after some time :( ). Smaller reason why I would like to do it is that I would like to learn c++11 features, because peo...
Dispelling the UIImage imageNamed: FUD
...Feb 2014: Note that this question dates from iOS 2.0! Image requirements and handling have moved on a lot since then. Retina makes images bigger and loading them slightly more complex. With the built in support for iPad and retina images, you should certainly use ImageNamed in your code .
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How to send email from Terminal?
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Go into Terminal and type man mail for help.
You will need to set SMTP up:
http://hints.macworld.com/article.php?story=20081217161612647
See also:
http://www.mactricksandtips.com/2008/09/send-mail-over-your-network.html
Eg:
mail -s "hello" "e...
Failed to load JavaHL Library
...ary -- SVNKit (http://svnkit.com). Just install the SVNKit client adapter and library plugins from the Subclipse update site and then choose it in the preferences under Team > SVN.
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How to clean project cache in Intellij idea like Eclipse's clean?
...for your installed version. The location of this folder depends on your OS and version installed.
Windows Vista, 7, 8, 10
<SYSTEM DRIVE>\Users\<USER ACCOUNT NAME>\.<PRODUCT><VERSION>
Linux/Unix
~/.<PRODUCT><VERSION>
Mac OS
~/Library/Caches/<PRODUCT><V...