Differences Between NSArray And NSSet in Objective C

NSSet

• Primarily access items by comparison
• Unordered
• Does not allow duplicates

NSArray

• Can access items by index
• Ordered
• Allows duplicates

Example

    NSSet *set = [NSSet setWithObjects:@"Amit",@"Rakesh",@"Kiran",@"Jai",@"zebra",@"Amit",@"Kiran", nil];

    NSArray *arr = [[NSArray alloc]initWithObjects:@"Amit",@"Rakesh",@"Kiran",@"Jai",@"zebra",@"Amit",@"Kiran", nil];

    

    NSLog(@"%@",set);

    NSLog(@"%@",arr);

outPut

2013-05-01 11:45:53.881 FirstStoryBoardViewController[630:c07] {(

    Jai,

    zebra,

    Rakesh,

    Amit,

    Kiran

)}

2013-05-01 11:45:54.384 FirstStoryBoardViewController[630:c07] (

    Amit,

    Rakesh,

    Kiran,

    Jai,

    zebra,

    Amit,

    Kiran

)