is there a way to create a single element

Iterable

without creating an array or list?

What's the benefit of this?

Same, curious, to what end?

^ which is what I wanted to suggest, but I don't understand what blocker the list causes

i'm using a

when

condition inside a

flatMap

, most of the conditions return lists but one has a single element, I was wondering if there was something without the (probably very low) overhead of creating an unnecessary list/array

What's the ultimate return type here? If all cases return a list, I would expect the calling code to expect a list to be returned, but if there's a case for only one then your calling code might get ugly? Side note: Loosely wondering if a sealed class could work here, but don't know if there's enough context.

the analog appears to be that,

listOf(element)

- I mean,

Observable.just

still creates an Observable…

flatMap

expects an

Iterable

Yeah, gonna need more context here

it's a good question, and I'm curious to see if someone thinks of anything, but I wouldn't argue that the list creation is too much overhead to stress if you don't get an answer. ¯\_(ツ)_/¯

yea I didn't know if there was a lightweight wrapper around a value that implemented

Iterable

, but I don't see anything like that

listOf()

with a single item ultimately creates a

java.util.SingletonList

(on the JVM at least) which is a very lightweight list implementation.

good to know