How do I write a shorthand for a datatype in Scala -

how write shorthand datatype? example. lets instead of list[integer], rather type integers

instead of this

def processnumbers(input:list[integer]):list[integer] = ... 

to

def processnumbers(input:integers):integers = ... 

is possible?

thanks

yes, can type alias.

type integers = list[int]  // scala.int preferred on java.lang.integer 

that being said, isn't use them. list[int] clear other scala developers, wheres type integers provides no information , detract readability of code on time.

a use of type aliases improve code's readability though like

type userid = int def processusers(ids: list[userid]): foo 

in case provides information reader vs

def processusers(ids: list[int]): foo 

using kind of type alias allow gradually make code more type-safe on time changing definition type alias value class.

case class userid(value: int) extends anyval 

you won't need change method signatures of having "userid", let compiler assist in making sure don't like

val ids: list[int] = getblogpostids() val foo = processusers(ids) // oops, ints blog posts, not users 

using value class approach, mistake becomes compiler error. used pervasively adds quite lot of guidance in writing correct code.

val ids: list[blogpostid] = getblogpostids val foo = processusers(ids) // compile error; blogpostid != userid