Functional Kotlin

Named parameters

Ideally, our functions should not have too many parameters, but this isn't always the case. Some functions tend to be big, for example, the data class constructors (constructors are technically a function that returns a new instance).

What is the problem with functions with many parameters?

• They are hard to use. This can be alleviated or fixed with default parameters that we will cover in the next section, Default parameters.
• They are hard to read—named parameters to the rescue.
• They are probably doing too much. Are you sure that your function isn't too big? Try to refactor it and clean up. Look for possible side effects and other harmful practices. A special case is data class constructors, as they are just autogenerated ...