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humanscape-david/composed-function.kt

Created June 30, 2020 04:25
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코틀린에서 합성함수의 일반화
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composed-function.kt
fun main(args: Array<String>) {
val addThree = { i: Int -> i + 3 }
val twice = { i: Int -> i * 2 }
val composedFunc = addThree compose twice
println(composedFunc(3)) // 9 출력
}
infix fun <F, G, R> ((F) -> R).compose(g: (G) -> F): (G) -> R {
return { gInput: G -> this(g(gInput))}
}
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