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How to limit the maximum value of a numeric field in a Django model?
...model-fields/#howto-custom-model-fields
In this case, you could 'inherit' from the built-in IntegerField and override its validation logic.
The more I think about this, I realize how useful this would be for many Django apps. Perhaps a IntegerRangeField type could be submitted as a patch for the D...
How do I implement interfaces in python?
...ts a specific interface, and you can use ABC's for that too by subclassing from them. Another way is zope.interface, a module that is a part of the Zope Component Architecture, a really awesomely cool component framework. Here you don't subclass from the interfaces, but instead mark classes (or even...
Changing Locale within the app itself
...
Is you preference activity being called from you main activity? you could place this in the on resume... @Override protected void onResume() { if (!(PreferenceManager.getDefaultSharedPreferences( getApplicationContext()).getString("listLanguage", "en") .equ...
Remove a string from the beginning of a string
... came in at .17 sec, whereas (substr($str, 0, strlen($prefix)) == $prefix) from the accepted answer was more like .37
– billynoah
Jul 31 '15 at 5:33
add a comment
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What is the difference between getFields and getDeclaredFields in Java reflection
...ent class, not any base classes that the current class might be inheriting from.
To get all the fields up the hierarchy, I have written the following function:
public static Iterable<Field> getFieldsUpTo(@Nonnull Class<?> startClass,
@Nullable Class&...
How to create a file in Linux from terminal window? [closed]
...le.txt
The file is created, but it's empty and still waiting for the input from the user. You can type any text into the terminal, and once done CTRL-D will close it, or CTRL-C will escape you out.
Simply using > to create a text file: $ > NewFile.txt
Lastly, we can use any text editor name a...
Git - deleted some files locally, how do I get them from a remote repository
...No downloading is necessary; you just need to extract the content you want from the repo at your fingertips.
If you haven't committed the deletion, just check out the files from your current commit:
git checkout HEAD <path>
If you have committed the deletion, you need to check out the file...
Using {} in a case statement. Why?
...ed in the C++ draft standard section 6.1 Labeled statement) and we can see from section 6.7 paragraph 3 that jumping pass a declaration is not allowed in many cases, including those with an initialization:
It is possible to transfer into a block, but not in a way that bypasses declarations with ...
When is it appropriate to use C# partial classes?
...nting interfaces in C#, and keeping the interface members clearly seperate from the class-members: stackoverflow.com/questions/3601901/why-use-partial-classes/…
– STW
Aug 30 '10 at 21:14
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Why is `std::move` named `std::move`?
... given rvalue
arguments. This is perfectly safe because moving resources from an
rvalue can not be noticed by the rest of the program (nobody else has
a reference to the rvalue in order to detect a difference).
If at the time swap was instead presented like this:
template <class T>
vo...