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What is the difference between class and instance attributes?
...just look in each instance's __dict__ and the class's __dict__. It just usually doesn't matter very much whether immutable types are shared or not.
– abarnert
Oct 29 '14 at 22:58
1...
What does addChildViewController actually do?
...main view controller. This will soon make things complicated and create an extra dependency between unrelated components in the app.
That was in the past, before the concept of child view controllers is introduced. But now, you only need to addChildViewController to the main view controller and ev...
What are the differences between the different saving methods in Hibernate?
... often has performance limitations compared to an update as it seems to do extra fetching for integrity checks of some sort.
– Martin Dale Lyness
Jun 18 '09 at 13:00
1
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C state-machine design [closed]
... an enum. It also makes for much cleaner code since you don't need all the extra cruft of function pointers or huge switch statements and while loops. Did I mention it's more efficient too?
Here's what a state machine might look like:
void state_machine() {
first_state:
// Do some stuff here
...
How to get users to read error messages?
... Instead of requiring users to figure out the date format, take a couple extra minutes and teach your software how to parse dates in multiple formats. The computer is smart -- let it help the user rather than slap their wrists.
– Bryan Oakley
Jul 18 '10 at 4:...
Removing elements by class name?
...Brett - do it anyway! It'll take a few minutes of your time and you'll get extra high-fives at the office :)
– karim79
Jan 23 '11 at 23:13
...
PHP Multidimensional Array Searching (Find key by specific value)
...;
Will produce:
array(2) {
[5]=>
array(2) {
["foo"]=>
string(5) "test4"
["bar"]=>
string(4) "baz1"
}
[10]=>
array(2) {
["foo"]=>
string(5) "test4"
["bar"]=>
string(4) "baz1"
}
}
...
Why are static variables considered evil?
...n the container itself is not global. Compared to "normal" code, the only extra thing that a container-managed object is visible to is to the container itself. In fact, DI is very commonly used to avoid the Singleton Pattern.
– Floegipoky
Nov 27 '13 at 21:50
...
How can I tell gcc not to inline a function?
Say I have this small function in a source file
8 Answers
8
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Save An Image To Application Documents Folder From UIView On IOS
...thForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
NSString *filePath = [documentsPath stringByAppendingPathComponent:@"image.png"]; //Add the file name
[pngData writeToFile:filePath atomically:YES]; /...