Checking for null objects

gistfile1.m

@implementation RRUser
@synthesize email, name, facebookId, userId, sessionToken, imageUrl;
-(void) parseResponse:(NSDictionary*) data {
    // this is a better way to test, if the class responds to a selector
    // then go ahead and read from it
    if([[data objectForKey:@"email"] respondsToSelector:@selector(length)]) {
        self.email = [data objectForKey:@"email"];
    }
    if([[data objectForKey:@"name"] respondsToSelector:@selector(length)]) {
        self.name = [data objectForKey:@"name"];
    }
    // incase you read from self.name, it would crash, since name would be null
    if([data objectForKey:@"name"] != Nil) {
        self.name = [data objectForKey:@"name"];
    }

}
@end