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Title
g

gian

12/18/2019, 10:26 AM
Any chance to have something similar to an eta reduce in Kotlin?
e

elizarov

12/18/2019, 10:27 AM
What is the problem you are trying to solve?
g

gian

12/18/2019, 10:28 AM
It’s just styling, I would like to say that a function is equal to another function, without manually passing the parameter
e

elizarov

12/18/2019, 10:28 AM
why would you need this?
g

gian

12/18/2019, 10:29 AM
to delegate, for example
Maybe I’ve been spoiled by haskell
e

elizarov

12/18/2019, 10:29 AM
can you give a snippet of code?
(can be in Haskell)
g

gian

12/18/2019, 10:32 AM
funName i = otherFun i
vs
funName = otherFun

fun funName(i: A) = otherFun(i)
in kotlin I can do that provided that it’s not a function, but a
val
e.g.
val a:(Int)->String = ::otherFun
e

elizarov

12/18/2019, 10:34 AM
Yes. What’s the problem with that?
And you can even omit type.
g

gian

12/18/2019, 10:36 AM
that I need the original declaration to be a
val
and not a
fun
, right? 🤔
e

elizarov

12/18/2019, 10:36 AM
But why it matter? Like there’s no difference between them in Haskell.
g

gian

12/18/2019, 10:37 AM
I don’t always control the function
maybe it comes from an interface
and I want to “delegate” the implementation
I guess in Kotlin would be something like: fun funName by otherFun
e

elizarov

12/18/2019, 10:38 AM
There are some plans for
fun a(i: Int) by ::otherFun
but not in the near future.
🤩 1
💯 1
✔️ 1
🙏 1
g

gian

12/18/2019, 10:39 AM
Well, nice to hear that 😄
e

elizarov

12/18/2019, 10:39 AM
For now, if you come from Haskell you can use
val
everywhere, even in your interfaces.
g

gian

12/18/2019, 10:40 AM
Yes, I’m doing that when I control them Thank you!