Count number of newlines in a file
Hi, What is the smallest code I can use to count the number of occurrences of the newline character in a file with objective-c / cocoa touch? Thanks! ...
cocoa-touch
Generating permutations of NSArray elements
Let's say I have an NSArray of NSNumbers like this: 1, 2, 3 Then the set of all possible permutations would look something like this: 1, 2, 3 1, 3, 2 2, 1, 3 2, 3, 1 3, 1, 2 3, 2, 1 What's a good way to do this in XCode? ...
How to pass a string to a function in Objective-C
I made a method like this: -(void) doSomething:(NSString *)str { } I call it like this doSomething(foo); It doesn't work. ...
How to convert this C# code to Objective-C
I need a function that does the same thing as the following: static public IEnumerable<string> permute(string word) { if (word.Length > 1) { char character = word[0]; foreach (string subPermute in permute(word.Substring(1))) { for (int index = 0; index <= subPermute.Length; index++) ...
Can you tell me what this code does in pseudocode?
Possible Duplicate: How to convert this C# code to Objective-C This code purportedly does what I need in Objective-C but it's written in a different language. So I'm trying to convert this code to objective-c but I need to understand it better. It would be easier to understand if it was in pseudocode static public IEnumerable...
What kind of algorithm do I need?
I'm trying to figure out all the different ways I can create groups of 4 from 6 objects using objective-c. For example, if I had the following objects: a, b, c, d, e, f Then I could create groups like a, b, c, d b, c, d, e a, d, e, f and so on. Order doesn't matter. If I wanted to figure out all the different possibilities, what ki...
How to order an array of objects by a certain property in XCode
Let's say I have an array of custom objects. The custom class looks like this Person ------- name number Now let's say I want to rearrange the array of these objects so that the objects are sorted by the number. How can this be done? ...
Application crashing upon release of UITableViewController
I have a class that retrieves data from core data and stores it into a NSMutablearray. It also has a function that returns this array. datamanager.h: @interface DataManager : NSObject { NSMutableArray *feedItems; ... } @property (nonatomic, retain) NSMutableArray *feedItems; ... datamanager.m: ... -(void)loadNews{ ...
Problems with escaped characters in JSON string
Hi! I have a JSON-string where I know where the problem is, I just can't figure out what to do. I have looked up the "forbidden characters" in a JSON-string but it just doesn't work. When you run the show-method for FBStreamDialog for iPhone a view comes up with how it's going to look like when it's finally posted on the wall. This hap...
EXC_BAD_ACCESS - NSZombieEnabled is not showing anything.
I am getting an EXC_BAD_ACCESS when trying to push a view controller onto the navigation stack. When enabling NSZombies, I do not get any extra information for some reason, and I can't work out why. I'm pretty certain I don't need to use CFZombies. Here is the code that seems to be causing the issue: - (void)tableView:(UITableView *)tab...
How to pass arguments to a cocoa-touch app
I noticed in main.m it appears to recognize parameters like any c program. How can I pass arguments to the app? ...
iostream and sstream for Objective-C
I'm trying to port some C++ code to Objective-C. It includes iostream and sstream, but Objective-C does not recognize these. What should be done? ...
NSString to camel case
Hi all, I am trying to figure out how to take a given NSString and convert it to camel case. I have seen lots of code samples out there for going back and forth between underscores_ and camel-case, but I am dealing with strings that are capitalized. So if I had the string: 12345 SAMPLE STREET #12 or 789 N HASKELL STREET, how would I ...
Getting the frame / bounds of a view
Another newbie question: If I have a UIViewController with a navigation bar visible at the top and a visible toolbar at the bottom, how do I ask the view controller for the coordinates (frame, bounds) of the "visible" area of the view? (self.view.frame and self.view.bounds return null)... ...
How to use printf with NSString
I need to use something like NSLog but without the timestamp and newline character, so I'm using printf. How can I use this with NSString? ...
How to get a single character from an NSString
This is what I'm using [[remaining_string substringFromIndex:k] substringToIndex:1] Is there a better way? ...
Why doesn't this code produce the correct output?
Given a string and a number, this function will produce all possible combinations of n letters from that string. i.e. If I pass "abcd" and 3, then I should get the following output: abc abd acd bcd This is the code - (void)viewDidLoad { [super viewDidLoad]; [self expand_combinations:@"abcd" arg2:@"" arg3:3]; } -(void) expan...
Setting a UIImage border
Is there a way to set borders to a UIImage. I know how to set it for UIImageView, but my problem is the UIImage that I load up in a UIImageview wont be of the same size or aspect ratio as the UIImageView. Hence Ive kept the UIImageView mode to aspect fit. Giving a border to UIImageView now would border the entire UIImageView rather than ...
UIScrollView scroll detection
I have a UIScrollView in a UIViewController view that scrolls horizontally. How can I detect whether the scroll is at the left end or right end or somewhere in the middle? ...
How to change this so that it returns arrays
The following code works perfectly and shows the correct output: - (void)viewDidLoad { [super viewDidLoad]; [self expand_combinations:@"abcd" arg2:@"" arg3:3]; } -(void) expand_combinations: (NSString *) remaining_string arg2:(NSString *)s arg3:(int) remain_depth { if(remain_depth==0) { printf("%s\n",[s UTF8Stri...