Hi, I would like to contribute to the Kotlin standard library by adding some extension functions to

Pair

and

Triple

for transforming the individual components using a mapping function. This will make the two types more ergonomic to use in a functional programming context. I opened an issue on this here but it seems that there already existed a similar issue. I'm thinking something like this:

val x = Pair(1,"Hello")
val y = x.mapSecond { it.length }

println(y) // prints (1, 5)

The new extension function is

mapSecond

. And there will be a `mapFirst`for Pair also. For Triple I'll add

mapFirst

,

mapSecond

and

mapThird

. Does this seem like a good idea? What are the chances that a PR will be merged?