Objective-C Language Modern Objective-C Container subscripting
Example
In modern Objective C syntax you can get values from NSArray and NSDictionary containers using container subscripting.
Old way:
NSObject *object1 = [array objectAtIndex:1];
NSObject *object2 = [dictionary objectForKey:@"Value"];
Modern way:
NSObject *object1 = array[1];
NSObject *object2 = dictionary[@"Value"];
You can also insert objects into arrays and set objects for keys in dictionaries in a cleaner way:
Old way:
// replacing at specific index
[mutableArray replaceObjectAtIndex:1 withObject:@"NewValue"];
// adding a new value to the end
[mutableArray addObject:@"NewValue"];
[mutableDictionary setObject:@"NewValue" forKey:@"NewKey"];
Modern way:
mutableArray[1] = @"NewValue";
mutableArray[[mutableArray count]] = @"NewValue";
mutableDictionary[@"NewKey"] = @"NewValue";
