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Core Data: Quickest way to delete all instances of an entity
...und in the "What's New in Core Data" session from WWDC 2015 (starting at ~14:10).
iOS 8 and earlier:
Fetch 'em all and delete 'em all:
NSFetchRequest *allCars = [[NSFetchRequest alloc] init];
[allCars setEntity:[NSEntityDescription entityForName:@"Car" inManagedObjectContext:myContext]];
[allCars...
When to use ' (or quote) in Lisp?
...g like this (slightly prettyfied):
'((allocate 3)
(allocate 7)
(free 14)
(allocate 19)
...)
Remember what I said about quote ("tick") causing the default rule not to apply? Good. What would otherwise happen is that the values of allocate and free are looked up, and we don't want that. In...
How to format date and time in Android?
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24 Answers
24
Active
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How to get hex color value rather than RGB value?
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142
var hexDigits = new Array
("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e",...
How do I detect whether a Python variable is a function?
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934
If this is for Python 2.x or for Python 3.2+, you can also use callable(). It used to be depreca...
C++ IDE for Macs [closed]
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edited Oct 13 '16 at 20:34
Lidakis Emmanuel
1,02588 silver badges1111 bronze badges
answered Oct 21 '08...
Programmatically get height of navigation bar
...bar) pushes down the UIView by its height. I also know that this height = 44px. I have also discovered that this push down maintains the [self.view].frame.origin.y = 0 .
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MySQL pagination without double-querying?
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answered May 4 '09 at 2:37
staticsanstaticsan
27.5k44 gold badges5454 silver badges7171 bronze badges
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
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84
In Urlmon.dll, there's a function called FindMimeFromData.
From the documentation
MIME typ...
Is there a way to view past mysql queries with phpmyadmin?
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answered Jul 14 '10 at 15:21
chris1979chris1979
2,26733 gold badges1313 silver badges66 bronze badges
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