How to remove duplicate of objects that has same value from NSArray

Question

I have an NSDictinary look like this:

NSArray *duplicates = @[@{@\"name\": @\"a\", @\"id\": @\"123\"}, @{@\"name\": @\"c\", @\"id\": @\"234\"},          


        

Answer 1

Have you try this code

NSArray *duplicates = @[@{@"name": @"a"}, @{@"name": @"c"}, @{@"name": @"a"}, @{@"name": @"c"}, @{@"name": @"a"}];
NSSet *set = [NSSet setWithArray:duplicates];
NSArray *uniqueArray = [set allObjects];

Answer 2

Just use following code for remove duplicates values.

your_array = [self groupsWithDuplicatesRemoved:(NSArray *)your_array myKeyParameter:@"your_key_name"];

You have to just call groupsWithDuplicatesRemoved this method with key name.

- (NSMutableArray *) groupsWithDuplicatesRemoved:(NSArray *)  groups myKeyParameter:(NSString *)myKeyParameter {
    NSMutableArray * groupsFiltered = [[NSMutableArray alloc] init];    //This will be the array of groups you need
    NSMutableArray * groupNamesEncountered = [[NSMutableArray alloc] init]; //This is an array of group names seen so far

    NSString * name;        //Preallocation of group name
    for (NSDictionary * group in groups) {  //Iterate through all groups
        name = [NSString stringWithFormat:@"%@", [group objectForKey:myKeyParameter]]; //Get the group name
        if ([groupNamesEncountered indexOfObject: name]==NSNotFound) {  //Check if this group name hasn't been encountered before
            [groupNamesEncountered addObject:name]; //Now you've encountered it, so add it to the list of encountered names
            [groupsFiltered addObject:group];   //And add the group to the list, as this is the first time it's encountered
        }
    }
    return groupsFiltered;
}

Hope, this is what you're looking for. Any concern get back to me. :)