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Android: How to enable/disable option menu item on button click?
I can easily do it when I am using onCreateOptionsMenu or onOptionsItemSelected methods.
12 Answers
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Is it a bad practice to use negative margins in Android?
...r been officially supported and won't be supported by ConstraintLayout.
It is easy to work around this limitation though.
Add an helper view (height 0dp, width constrained to parent) at the bottom of your base view, at the bottom add the margin you want.
Then position your view below this one,...
How to efficiently count the number of keys/properties of an object in JavaScript?
...at's the fastest way to count the number of keys/properties of an object? It it possible to do this without iterating over the object? i.e. without doing
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How do I start PowerShell from Windows Explorer?
...hell or powershell_ise and press Enter. A PowerShell command window opens with the current directory.
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Is there a documented way to set the iPhone orientation?
...apping the views out I would like to force the rotation to be set to portrait.
17 Answers
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How does interfaces with construct signatures work?
...ame);
This creates an actual constraint for what you can invoke makeObj with:
class Other implements ComesFromString {
constructor (public name: string, count: number) {
}
}
makeObj(Other); // Error! Other's constructor doesn't match StringConstructable
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Why start an ArrayList with an initial capacity?
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If you know in advance what the size of the ArrayList is going to be, it is more efficient to specify the initial capacity. If you don't do this, the internal array will have to be repeatedly reallocated as the list grows.
The larger the final list, the more time you save by avoiding the reall...
How to work with Git branches and Rails migrations
I am working on a rails app with quite a few git branches and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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Objective-C : BOOL vs bool
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From the definition in objc.h:
#if (TARGET_OS_IPHONE && __LP64__) || TARGET_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned...
Is it considered acceptable to not call Dispose() on a TPL Task object?
I want to trigger a task to run on a background thread. I don't want to wait on the tasks completion.
3 Answers
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