gistfile1.txt

// Maybe a functional category on NSArray will help.

@interface NSArray(Extension)
-(NSArray*) map:(id(^)(id object))block;
@end

@implementation NSArray(Extension)
-(NSArray*) map:(id(^)(id object))block {
    NSParameterAssert(block != NULL);
    NSMutableArray *results = [[NSMutableArray alloc] initWithCapacity:[self count]];
    for (id object in self) {
        id result = block(object);
        [results addObject:result];
    }
    return results;
}
@end

@interface Driver : NSObject
@property (strong, nonatomic) NSString *name;
@end
@implementation Driver
-(id)initWithName:(NSString*)name {
    self = [super init];
    if (self){
      _name = name;
    }
    return self;
}
@end

int main(int argc, char *argv[]) {
	@autoreleasepool {
            NSArray *input = @[ [[Driver alloc]initWithName:@"a"], [[Driver alloc]initWithName:@"b"] ];
	    NSArray *drivers = [input map:^(id object){
	        return [object name];
	    }];
	    NSLog(@"%@",drivers);
	}
}