looping through an NSMutableDictionary

Question

How do I loop through all objects in a NSMutableDictionary regardless of the keys?

Answer 1

1. For simple loop, fast enumeration is a bit faster than block-based loop
2. It's easier to do concurrent or reverse enumeration with block-based enumeration than with fast enumeration When looping with NSDictionary you can get key and value in one hit with a block-based enumerator, whereas with fast enumeration you have to use the key to retrieve the value in a separate message send

in fast enumeration

for(id key in myDictionary) {
   id value = [myDictionary objectForKey:key];
  // do something with key and obj
}

in Blocks :

[myDictionary enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {

   // do something with key and obj
  }];