Collection in iOS (Objective C)

Use of NSSet

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

    @autoreleasepool {

        //NSSet Example which uses its own for loop to print seperating by comma.

        NSSet *names=[NSSet setWithObjects:@ "Stefan",@ "Silas",@ "Damon", nil];

        NSLog(@ "%@",names);

        

        //To calculate the number of objects in a set.

        NSLog(@ "The set has %lu elements",names.count);

        

        //Fast Enumeration

        for(id name in names){

            NSLog(@ "%@",name);

        }

        

        //enumerate objects using Block

        [names enumerateObjectsUsingBlock:^(id obj, BOOL *stop){

            NSLog(@ "Current item: %@",obj);

            if ([obj isEqualToString:@ "Damon"]) {

                NSLog(@ "I was looking for Damon and I found him!");

                *stop=YES; //stop enumerating item

            }

        }];

    }

    return 0;

}