Functional Kotlin

Pipes

A pipe function takes a T value and invokes a (T) -> R function with it:

import arrow.syntax.function.pipefun main(args: Array<String>) {    val strong: (String) -> String = { body -> "<strong>$body</strong>" }   "From a pipe".pipe(strong).pipe(::println)}

A pipe is similar to function composition, but instead of generating new functions, we can chain function invocations to produce new values, reducing nesting calls. Pipes are known in other languages, such as Elm and Ocaml, as the operator |>:

fun main(args: Array<String>) {   splitter(filterBills(calculatePrice(Quote(20.0, "Foo", "Shoes", 1)))) //Nested   Quote(20.0, "Foo", "Shoes", 1) pipe ::calculatePrice pipe ::filterBills pipe ::splitter //Pipe}

Both lines are equivalent, but the first ...