Okay, now I get it, the naming makes autocomplete more convenient.
Returning void makes it easier to spot errors. If you accidentally use "capitalizeInPlace" instead of "capitalizedString" your code will compile without issues. If the mutating method returned void, it would result in a compile error.
Returning void makes it easier to spot errors. If you accidentally use "capitalizeInPlace" instead of "capitalizedString" your code will compile without issues. If the mutating method returned void, it would result in a compile error.