nsarray

UIAlertSheet's constructor takes an otherButtonTitles parameter as a varg list. I'd like to specify the other button titles from an NSArray instead. Is this possible? i.e. I have to do this: id alert = [[UIActionSheet alloc] initWithTitle: titleString delegate: self cancelButtonTitle: cancelString destructiveButtonTitle: nil otherButtonTitles: button1Title, button2Title, nil]; But since I'm generating the list of available buttons at runtime, I really want something like this: id alert = [[UIActionSheet alloc] initWithTitle: titleString delegate: self cancelButtonTitle: cancelString

I have sort of an unfriendly array of dictionaries that in turn have arrays of data and I am trying to filter the outer array based on any of the inner array passing a predicate. I can't seem to create an NSPredicate to make this work. I started off with: NSPredicate *lookupPredicate = [NSPredicate predicateWithFormat: @"row_values.property_id == %@ AND row_values.property_value == %@", @"47cc67093475061e01000540", @"Male"]; [dataRows filterUsingPredicate:lookupPredicate]; This returns no values. I've tried various forms of ANY but I can't seem to find anything that it will parse. Again, the

I've got a text file, with about 200,000 lines. Each line represents an object with multiple properties. I only search through one of the properties (the unique ID) of the objects. If the unique ID I'm looking for is the same as the current object's unique ID, I'm gonna read the rest of the object's values. Right now, each time I search for an object, I just read the whole text file line by line, create an object for each line and see if it's the object I'm looking for - which is basically the most inefficient way to do the search. I would like to read all those objects into memory, so I can

The goal is to compare two arrays as and check if they contain the same objects (as fast as possible - there are lots of objects in the arrays). The arrays cannot be checked with isEqual: as they are differently sorted. I already tried the solution posted here ( https://stackoverflow.com/a/1138417 - see last code snippet of the post by Peter Hosey). But this doesn't work with differently sorted arrays. The code I'm using now is the following: + (BOOL)arraysContainSameObjects:(NSArray *)array1 andOtherArray:(NSArray *)array2 { // quit if array count is different if ([array1 count] != [array2

I have an NSArray with something similar to: 6/1/13 | Data 6/2/13 | Data 7/1/13 | Data 9/1/13 | Data What I need to somehow get the months to create section headers - but only if they are in the array and then break the dates up into the appropriate sections. Looking like: (Section Header)June 2013 6/1/13 | Data 6/2/13 | Data (Section Header)July 2013 7/1/13 | Data (skips august as no dates from august are in array) (Section Header)September 2013 9/1/13 | Data I am attempting to implement: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { return @

I've got an NSArray and have to iterate over it in a special case backwards, so that I first look at the last element. It's for performance reasons: If the last one just makes no sense, all previous ones can be ignored. So I'd like to break the loop. But that won't work if I iterate forward from 0 to n. I need to go from n to 0. Maybe there is a method or function I don't know about, so I wouldn't have to re-invent the wheel here. To add on the other answers, you can use -[NSArray reverseObjectEnumerator] in combination with the fast enumeration feature in Objective-C 2.0 (available in Leopard

I have an NSArray of NSDictionary objects. I want to filter the array based on keys of the dictionaries using NSPredicate. I have been doing something like this: NSString *predicateString = [NSString stringWithFormat:@"%@ == '%@'", key, value]; NSPredicate *predicate = [NSPredicate predicateWithFormat:predicateString]; NSArray *filteredResults = [allResultsArray filteredArrayUsingPredicate:predicate]; This works fine if they key passed in is one-word: Color, Name, Age. But it doesn't work if the key is multi-word, like: Person Age, Person Name. Basically, any key that contains a space, it