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How to define “type disjunction” (union types)?
...pproach, further generalization would require defining analogous Or3, Or4, etc. traits. Of course, defining such traits would be much simpler than defining the corresponding Either classes.
Update:
Mitch Blevins demonstrates a very similar approach and shows how to generalize it to more than two ...
Can I extend a class using more than 1 class in PHP?
...nd exactly the reason why many languages disallow multiple inheritance: in order to prevent "spaghetti inheritance", i.e. extending 3 classes because each has a method you need, and ending up with a class that inherits 100 method and 20 fields, yet only ever uses 5 of them.
...
How to add minutes to my Date
...
In order to avoid any dependency you can use java.util.Calendar as follow:
Calendar now = Calendar.getInstance();
now.add(Calendar.MINUTE, 10);
Date teenMinutesFromNow = now.getTime();
In Java 8 we have new API:
...
“This project is incompatible with the current version of Visual Studio”
...ons are available, e.g. web development tools, database development tools, etc. So if you're trying to open a web project but the web development tools weren't installed, it complains with this message.
This can happen if you create the project on another machine and try to open it on a new one. I ...
How can I change the EditText text without triggering the Text Watcher?
...d afterTextChanged(Editable s) {
//unregistering for event in order to prevent infinity loop
inputFileName.removeTextChangedListener(this);
//changing input's text
String regex = "[^a-z0-9A-Z\\s_\\-]";
String fileName = s.toString();
...
The 'json' native gem requires installed build tools
...file to point it to the correct one, then continue with ruby dk.rb review, etc.
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Remove all but numbers from NSString
...t decimal numbers including, for instance, Arabic-Indic digits (١٢٣٤٥ etc). Depending on your application, that could occasionally be a problem, but generally its either good or neutral, and a little shorter to type.
– Rob Napier
Jul 15 '09 at 14:03
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How can I return to a parent activity correctly?
... using two things:
call:
NavUtils.navigateUpFromSameTask(this);
Now, in order for this to work, you need to have your manifest file state that activity A
has a parent activity B. The parent activity doesn't need anything. In version 4 and above you will get a nice back arrow with no additional ef...
How to define optional methods in Swift protocol?
...cause the type of the parameter cannot be represented in Objective-C"
In order to declare optional protocols that work well with swift, declare the functions as variables instead of func's.
protocol Health {
var isInfoHealthy: (Info) -> (Bool)? { get set }
}
And then implement the proto...
TypeScript: casting HTMLElement
...t is not an actual array (e.g. it doesn't contain .forEach, .slice, .push, etc...).
Thus if it did convert to HTMLScriptElement[] in the type system, you'd get no type errors if you tried to call Array.prototype members on it at compile time, but it would fail at run time.
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