indexOfIdInOrganzationsArray

ConferenceModel.m

// used to determine correct location of object in array
- (NSInteger)indexOfIdInSessionsArray:(NSNumber*)inputNum {
    // simple loop.  Could use containsObject instead
    for (NSInteger i = 0; i < [self.sessionsArray count]; i++) {
        // check for NSNumber object equality
        SessionsModel *session = self.sessionsArray[i];
        if ([session.sessionId isEqual:inputNum]) {
            return i;
        }
    }
    return NSNotFound;
}

// used to determine correct location of object in array
- (NSInteger)indexOfIdInOrganzationsArray:(NSNumber*)inputNum {
    // simple loop.  Could use containsObject instead
    for (NSInteger i = 0; i < [self.organizationsArray count]; i++) {
        // check for NSNumber equality
        OrganizationsModel *org = self.organizationsArray[i];
        if ([org.organizationId isEqual:inputNum]) {
            return i;
        }
    }
    return NSNotFound;
}

// used to determine correct location of object in array
- (NSInteger)indexOfIdInPresentersArray:(NSNumber*)inputNum {
    for (NSInteger i = 0; i < [self.presentersArray count]; i++) {
        PresentersModel *pres = self.presentersArray[i];
        if ([pres.presenterId isEqual:inputNum]) {
            return i;
        }
    }
    return NSNotFound;
}

Code for use to convert from Objective-C to Java so won't use containsObject.