Kotlin: Create an array with inner-field of another array

Question

I was wondering if there was a shortcut to do that with Kotlin:

val userNames = ArrayList<String>()

for (user in users)
  userNames.add(user.name)

return userNames

That would be great if there was a one-line way to do this. Am I dreaming?

Thank you

Marko Topolnik · Accepted Answer · 2018-05-24 10:26:07Z

4

You're just performing a basic mapping operation. This is it:

users.map { it.name }

answered May 24, 2018 at 10:26

Marko Topolnik

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2 Comments

Any idea if there is an equivalent with Java 8? I could not find one :/

You couldn't find Stream.map()?