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Why is @autoreleasepool still needed with ARC?
...ed that Objective-C's memory administration (all the retains and releases, etc.) can be fully automatized at compile time. This is, just by reading the code, even before it is run! :)
In order to do so there is only one condition: We MUST follow the rules, otherwise the compiler would not be able t...
Get an object properties list in Objective-C
... needs a little extra to handle primitives, like int, long, float, double, etc.
I built off of his to add this functionality.
// PropertyUtil.h
#import
@interface PropertyUtil : NSObject
+ (NSDictionary *)classPropsFor:(Class)klass;
@end
// PropertyUtil.m
#import "PropertyUtil.h"
#import "ob...
Are there any downsides to passing structs by value in C, rather than passing a pointer?
...cc on x86_64. Anyone is welcome to add other architectures like MSVC, ARM, etc.)
Let's have our example program:
// foo.c
typedef struct
{
double x, y;
} point;
void give_two_doubles(double * x, double * y)
{
*x = 1.0;
*y = 2.0;
}
point give_point()
{
point a = {1.0, 2.0};
r...
How to simulate Android killing my process
... is in the background and the OS decides it needs the resources (RAM, CPU, etc.). I need to be able to simulate this behaviour during testing so that I can ensure that my application is behaving correctly. I want to be able to do this in an automated way so that I can test if the application behaves...
What is the purpose of willSet and didSet in Swift?
...stored property.
This is useful for sending notifications, synchronisation etc... (see example below)
Example 5. Concrete Example - ViewController Container
//Underlying instance variable (would ideally be private)
var _childVC : UIViewController? {
willSet {
//REMOVE OLD VC
pr...
How do I add tab completion to the Python shell?
...e.py shell , I get an InteractiveConsole shell - I can use tab completion, etc.
9 Answers
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Entity Framework is Too Slow. What are my options? [closed]
...k at the SQL generated, use debuggers, pre-compile, take many extra steps, etc. i.e. waste a lot of time. No one says - Simplify! Everyone wants to comlicate things further by taking even more steps (wasting time).
A common sense approach would be not to use EF or LINQ at all. Use plain SQL. Th...
Finding all cycles in a directed graph
... 1 then there is an infinite number of those. For example A-B-A, A-B-A-B-A etc. Or it may be possible to join together 2 cycles into an 8-like cycle etc., etc... The meaningful approach is to look for all so called simple cycles - those that do not cross themselves except in the start/end point. The...
Understanding MongoDB BSON Document size limit
...s file metadata.
You can use this method to store images, files, videos, etc in the database much as you might in a SQL database. I have used this to even store multi gigabyte video files.
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Android screen size HDPI, LDPI, MDPI [duplicate]
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320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
480dp: a tweener tablet like the Streak (480x800 mdpi).
600dp: a 7” tablet (600x1024 mdpi).
720dp: a 10” tablet (720x1280 mdpi, 800x1280 mdpi, etc).
...