iPhone - Merge keys in a NSArray (Objective-C)

Question

Hi everyone, I'm having troubles with arrays and keys... I have an array from my database:

NSArray *elementArray = [[[menuArray valueForKey:@"meals"] valueForKey:@"recipe"] valueForKey:@"elements"]

The problem here is that I would like all my elements of all my meals of all my menus in an array such that: [elementArray objectAtIndex:0] = my first element etc... In the example above, the elements are separated by the keys. How can I get that?

Hope it's clear enough...

Thanks

Answer 1

From your code snippet, it is not clear to me exactly how your data is structured, but I think it's analogous to having an NSDictionary (called aDictionary) of NSArray and wanting to combine all the NSArray into one. If this is the case, then:

NSMutableArray *resultArray = [[[NSMutableArray alloc] init] autorelease];
for (id dictionaryKey in aDictionary) {
    [resultArray addObjectsFromArray:[aDictionary objectForKey:dictionaryKey]];
}
return [NSArray arrayWithArray:resultArray];

(This code has not been tested.)