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Usages of Null / Nothing / Unit in Scala
...mple is this:
implicit def zeroNull[B >: Null] =
new Zero[B] { def apply = null }
Nothing is used in the definition of None
object None extends Option[Nothing]
This allows you to assign a None to any type of Option because Nothing 'extends' everything.
val x:Option[String] = None
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What is the most “pythonic” way to iterate over a list in chunks?
...his is the most generic and pythonic way. Clear and concise. (and works on app engine)
– Matt Williamson
Aug 8 '10 at 4:08
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How to use OpenFileDialog to select a folder?
...ember as a user I was blaming these poor programmers that made yet another app with this awful tree view dialog (which is just the FolderBrowserDialog). It is completely unusable: a bunch of root dirs, a missing favorites panel, and the most horrible — you can't even paste a path there! And now as...
How to get Ruby / Homebrew / RVM to work on Yosemite?
...t permitted" because of the rootless mode. You can find a workaround here: apple.stackexchange.com/questions/196224/…
– Jorge Ortiz
Feb 16 '16 at 10:17
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Gridview height gets cut
...verticalSpacing="20dp" />
Lastly you just need to ask it to expand:
mAppsGrid = (ExpandableHeightGridView) findViewById(R.id.myId);
mAppsGrid.setExpanded(true);
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What package naming convention do you use for personal/hobby projects in Java?
...main name (ie. using com.john as your package name just because your name happens to be John is not a good idea).
If you're going to give the code to anybody else, you should use a globally unique package name, which according to Java conventions means you should register and use a domain name.
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How to set a value of a variable inside a template code?
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Create a template tag:
The app should contain a templatetags directory, at the same level as models.py, views.py, etc. If this doesn’t already exist, create it - don’t forget the __init__.py file to ensure the directory is treated as a Python packa...
Reformat XML in Visual Studio 2010
... while viewing it Visual Studio 2010. For example, if you open a generated app.config file, it might look like:
3 Answers
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Disable double-tap “zoom” option in browser on touch devices
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Note (as of 2020-08-04): this solution does not appear to work in iOS Safari v12+. I will update this answer and delete this note once I find a clear solution that covers iOS Safari.
CSS-only solution
Add touch-action: manipulation to any element on which you want to disab...
How does the keyword “use” work in PHP and can I import classes with it?
...ll find it strange, but when you are working with a big MVC structure, it happens. So if you have two classes with the same name, put them in different namespaces. Now consider when your auto loader is loading both classes (does by require), and you are about to use object of class. In this case, th...