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When is SQLiteOpenHelper onCreate() / onUpgrade() run?
...sion)
So when the database helper constructor is called with a name (2nd param), platform checks if the database exists or not and if the database exists, it gets the version information from the database file header and triggers the right call back
As already explained in the older answer, if th...
Most efficient method to groupby on an array of objects
... * and returns a Map of the array grouped by the grouping function.
*
* @param list An array of type V.
* @param keyGetter A Function that takes the the Array type V as an input, and returns a value of type K.
* K is generally intended to be a property key of V.
*
* @returns M...
Check play state of AVPlayer
...
To get notification for reaching the end of an item (via Apple):
[[NSNotificationCenter defaultCenter]
addObserver:<self>
selector:@selector(<#The selector name#>)
name:AVPlayerItemDidPlayToEndTimeNotification...
Equivalent to 'app.config' for a library (DLL)
...ecially the appSettings section, in a class library. If your library needs parameters, they should probably be passed as method arguments in constructors, factory methods, etc. by whoever is calling your library. This prevents calling applications from accidentally reusing configuration entries that...
Default height for section header in UITableView
...
In IOS 5.0 onwards you can return UITableViewAutomaticDimension in most of the delegate methods. Its at the bottom of the documentation page
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)se...
angularjs directive call function specified in attribute and pass an argument to it
...o's example change:
In template
<div my-method="theMethodToBeCalled(myParam)"></div>
In directive link function
$(element).click(function( e, rowid ) {
scope.method({myParam: id});
});
This does have one disadvantage compared to marko's solution - on first load theMethodToBeCall...
What is the AppDelegate for and how do I know when to use it?
...design approach implied by Andrew's use of the term "heart of your application". What I mean by this is that I think you should avoid lumping too many things in a central location -- good program design normally involves separating functionality by "area of concern".
A delegate object is an object ...
Can I change multiplier property for NSLayoutConstraint?
...f you have only have two sets of multipliers that need to be applied, from iOS8 onwards you can add both sets of constraints and decide which should be active at any time:
NSLayoutConstraint *standardConstraint, *zoomedConstraint;
// ...
// switch between constraints
standardConstraint.active = NO...
targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionVi
...
@TomSawyer Params are 'let' by default. Try to declare function as this in Swift (using var before param): override func targetContentOffsetForProposedContentOffset(var proposedContentOffset: CGPoint) -> CGPoint
...
Is .NET/Mono or Java the better choice for cross-platform development? [closed]
... isn't implemented everywhere, and it lags behind the Microsoft implementation significantly. The Java SDK seems to stay in better sync across platforms (and it works on more platforms).
I'd also say Java has more tool availability across all those platforms, although there are plenty of tools a...