Remove Duplicate Objects From NSMutableArray object property? [duplicate]

Question

I have one NSObject with properties as following

@property (nonatomic, retain) NSString * destinationid;
@property (nonatomic, retain) NSString * destinationname;
@property (nonatomic, retain) NSString * assetid;
@property (nonatomic, retain) NSString * assetname;
@property (nonatomic, retain) NSString * assetdescription;

Here, I save this in NSMutableArray.

The data which I get from server contains same DestinationName, but different other properties.

I want to check, if same name of Object is already added to NSMutableArray, don't add it again.

I tried to user innner loops but no use :(

Thanks

Answer 1

Here's one solution:

NSArray *originalArray = ... // original array of objects with duplicates
NSMutableArray *uniqueArray = [NSMutableArray array];
NSMutableSet *names = [NSMutableSet set];
for (id obj in originalArray) {
    NSString *destinationName = [obj destinationname];
    if (![names containsObject:destinationName]) {
        [uniqueArray addObject:obj];
        [names addObject:destinationName];
    }
}

Answer 2

One way to do it is to create a new array that only contains the destination names from your other array, and check if the name from your server is contained there:

NSArray *names = [self.mut valueForKey:@"destinationname"];
    if (![names containsObject:destName]) {
        [self.mut addObject:newObjectFromServer];
    }

mut is the name of my mutable array, and destName is the destination name in the object your getting from the server.