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In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
...nil;
Will be transformed to:
NSError * __strong error = nil;
When you call your save method:
- ( BOOL )save: ( NSError * __autoreleasing * );
The compiler will then have to create a temporary variable, set at __autoreleasing. So:
NSError * error = nil;
[ database save: &error ];
Will ...
Kill process by name?
I'm trying to kill a process (specifically iChat). On the command line, I use these commands:
15 Answers
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Is there a way to hide the scroll indicators in a UIScrollView?
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As of iOS 11, this should be called in viewWillAppear, it doesn't work if called in viewDidLoad
– melvinto
Mar 8 '18 at 17:38
ad...
Correct way to quit a Qt program?
... not want to exit with return code zero which means success, so you should call QCoreApplication::exit() because you can provide a non-zero returnCode which, by convention, indicates an error.
It is important to note that "if the event loop is not running, this function (QCoreApplication::exit()) d...
Declaring array of objects
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@PrasathK, do you mean you're populating your array dynamically (e.g. through a loop)? Then you should follow Daniel's answer and use push().
– Frédéric Hamidi
Apr 1 '13 at 11:27
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Explain the “setUp” and “tearDown” Python methods used in test cases
...and tearDown methods while writing test cases apart from that setUp is called immediately before calling the test method and tearDown is called immediately after it has been called?
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CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...or the fat-arrow in defining methods is when you want to use a method as a callback and that method references instance fields:
class A
constructor: (@msg) ->
thin: -> alert @msg
fat: => alert @msg
x = new A("yo")
x.thin() #alerts "yo"
x.fat() #alerts "yo"
fn = (callback) -> c...
Scala constructor overload?
...rth explicitly mentioning that Auxiliary Constructors in Scala must either call the primary constructor (as in landon9720's) answer, or another auxiliary constructor from the same class, as their first action. They cannot simply call the superclass's constructor explicitly or implicitly as they can ...
JPA : How to convert a native query result set to POJO class collection
...ception e) {
throw new RuntimeException(e);
}
}
This method basically takes a tuple array (as returned by native queries) and maps it against a provided POJO class by looking for a constructor that has the same number of fields and of the same type.
Then we can use convenient methods lik...
Calling shell functions with xargs
I am trying to use xargs to call a more complex function in parallel.
5 Answers
5
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