How to

MutableList<String>

->

Array<String>

?

toTypedArray

Just interesting, why this function was not called simply

toArray

... ?

I would assume to avoid confusion with jvm primitive arrays like DoubleArray

Collection

has

toArray

on the JVM which does something different

ah that would make sense too

But in Java's source code it was exactly

toArray

in the place where

toTypedArray

in Kotlin works. I'm confused

They're pretty much equivalent except for the syntax:

toTypedArray

works using reified generics and for

toArray

you need to create and pass the array yourself or live with an

Array<Any>

.

Ah, indeed, there was a call to

.toArray(new String[0])

I believe that the main reason is to be explicit about typed and primitive arrays extensions:

val a = listOf(1)
a.toIntArray() // IntArray, extension only for List<Int>
a.toTypedArray() // ArrayInt, extension for List<T>

Collection’s

toArray

is not a problem, because List is not implementing Java Collection in source code (but does on bytecode), so there is no name conflict