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How do I make and use a Queue in Objective-C?
...t-in-first-out, so we remove objects from the head
- (id) dequeue {
// if ([self count] == 0) return nil; // to avoid raising exception (Quinn)
id headObject = [self objectAtIndex:0];
if (headObject != nil) {
[[headObject retain] autorelease]; // so it isn't dealloc'ed on remove
...
How do I delete a local repository in git? [duplicate]
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Delete the .git directory in the root-directory of your repository if you only want to delete the git-related information (branches, versions).
If you want to delete everything (git-data, code, etc), just delete the whole directory.
.git directories are hidden by default, so you'll need to...
How can I recover the return value of a function passed to multiprocessing.Process?
... print str(procnum) + ' represent!'
return_dict[procnum] = procnum
if __name__ == '__main__':
manager = multiprocessing.Manager()
return_dict = manager.dict()
jobs = []
for i in range(5):
p = multiprocessing.Process(target=worker, args=(i,return_dict))
jobs.ap...
What's faster, SELECT DISTINCT or GROUP BY in MySQL?
If I have a table
15 Answers
15
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Android Endless List
How can I create a list where when you reach the end of the list I am notified so I can load more items?
10 Answers
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What is PECS (Producer Extends Consumer Super)?
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tl;dr: "PECS" is from the collection's point of view. If you are only pulling items from a generic collection, it is a producer and you should use extends; if you are only stuffing items in, it is a consumer and you should use super. If you do both with the same collection, you ...
Equivalent of jQuery .hide() to set visibility: hidden
... return (visibility == 'visible') ? 'hidden' : 'visible';
});
};
If you want to overload the original jQuery toggle(), which I don't recommend...
!(function($) {
var toggle = $.fn.toggle;
$.fn.toggle = function() {
var args = $.makeArray(arguments),
lastArg = a...
How do I get the last inserted ID of a MySQL table in PHP?
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If you're using PDO, use PDO::lastInsertId.
If you're using Mysqli, use mysqli::$insert_id.
If you're still using Mysql:
Please, don't use mysql_* functions in new code. They are no longer maintained and are officially ...
How big can a MySQL database get before performance starts to degrade
... against the slaves and the write queries run against the master. However if you are not ready for this yet, you can always tweak your indexes for the queries you are running to speed up the response times. Also there is a lot of tweaking you can do to the network stack and kernel in Linux that wi...
viewWillDisappear: Determine whether view controller is being popped or is showing a sub-view contro
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NSArray *viewControllers = self.navigationController.viewControllers;
if (viewControllers.count > 1 && [viewControllers objectAtIndex:viewControllers.count-2] == self) {
// View is disappearing because a new view controller was pushed onto the stack
NSLog(@"New view controlle...