nsmutablearray

I want to store two NSMutableArray that I use as global array in AppDelegate. These two array are also store with NSUserDefaults. Now I want to know how I must create this file and how can I store these two array everytime I modify them. Can You help me? Create an NSArray containing your two NSMutableArrays. NSArray *array = [NSArray arrayWithObjects:<#(id), ...#>, nil]; Write the array to a file. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *libraryDirectory = [paths objectAtIndex:0]; NSString *location = [libraryDirectory

I need to remove Null object added by [mutArrSkills addObject:[NSNull null]]; Do I need to iterate? Is there any function to remove all null values from NSMutableArray? If need to Iterate, how will I do that? You can use NSMutableArray 's removeObjectIdenticalTo: method, as follows [mutArrSkills removeObjectIdenticalTo:[NSNull null]]; to remove the null values. No need to iterate. removeObjectIdenticalTo: Removes all occurrences of a given object in the array. Discussion This method uses the indexOfObjectIdenticalTo: method to locate matches and then removes them by using removeObjectAtIndex:.

I need to create a mutable two-dimensional array in Objective-C. For example I have: NSMutableArray *sections; NSMutableArray *rows; Each item in sections consists of an array rows . rows is an array that contains objects. And I want to do something like this: [ sections[i] addObject: objectToAdd]; //I want to add a new row In order have something like this: section 0, rows: obj1, obj2, obj3 section 1, rows: obj4, obj5, obj6, obj 7... Is there a way to do that in Objective-C? mouviciel First, you must allocate and initialize your objects before use, something like: NSMutableArray * sections =

I've read all of the related posts regarding this and I am still having an error: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (5) must be equal to the number of rows contained in that section before the update (5), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).' Here are the details: in .h I have an NSMutableArray : @property (strong,nonatomic) NSMutableArray *currentCart;

I have this problem with removing duplicate objects from an array. I tried these already: noDuplicates = _personalHistory.personalHistory; for (int i=[noDuplicates count]-1; i>0; i--) { if ([noDuplicates indexOfObject: [noDuplicates objectAtIndex: i]]<i) [noDuplicates removeObjectAtIndex: i]; } for (PersonalHistory_artikels *e in _personalHistory.personalHistory) { if (![noDuplicates containsObject:e]) { NSLog(@"Dubplicates"); [noDuplicates addObject:e]; } } for (i=0; i<_personalHistory.personalHistory.count; i++) { PersonalHistory_artikels *test = [_personalHistory.personalHistory

Does anyone have advice on how to best initialize an NSMutableArray when it comes to dictating the capacity? The documentation mentions that "...even though you specify a size when you create an array, the specified size is regarded as a “hint”; the actual size of the array is still 0." So... 1) If I init with a greater capacity than I typically use, do I not have to worry about wasted memory? 2) If I init with a capacity typically lower than what I use, do I have to worry about heavier processing time allocating more memory to hold the extra elements? Just how impacting is this initialized