Objective-C literals: one can now create literals for NSArray, NSDictionary, and NSNumber (just like one can create literals for NSString) NSArray Literals Previously: array = [NSArray arrayWithObjects:a, b, c, nil]; Now: array = @[ a, b, c ]; NSDictionary Literals Previously: dict = [NSDictionary dictionaryWithObjects:@[o1, o2, o3] forKeys:@[k1, k2, k3]]; Now: dict = @{ k1 : o1, k2 : o2, k3 : o3