Subscripting
Clang introduces container access using standard subscripting, via square brackets. In other words, you can now access an NSArray just as you would a C array. You can do the same with an NSDictionary, although indexed by key rather than number. Here are a couple examples of doing so, using the array and dictionary declared earlier:
NSLog(@"%@", array[1]); // @"two" NSLog(@"%@", dictionary[@"key 2"]); // @"value 2"
But you’re not just limited to value look-ups. Using this new syntax, you can also perform assignments for mutable instances. Here’s how you might use the new subscripting features in simple assignments:
mutableArray[0] = @"first!"; mutableDictionary[@"some key"] ...
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