README.md

Runction

the library for your enjoyment with functions

---

add dependency

Gradle Kotlin DSL

build.gradle.kts

repositories {
    mavenCentral()
}

dependencies {
    implementation("io.github.muqhc:runction:0.3.0")
}

the other ways

• here

and use !

Hello.kt

import io.github.muqhc.runction.*

---

example

---

runc

val plus = runc<Int, Runction<Int,Int,Any,Any>, Any, Any> { a ->
    runc { b ->
        a+b
    }
}

println( plus(2)(7) ) // 2 + 7 = 9

val plusTen = plus(10)

println( plusTen(4) ) // 10 + 4 = 14

---

decoration

val plus = runc<Int, Runction<Int,Int,Int,Int>, Any, Any> { a ->
    runc { b ->
        decoration( a+b )
    }
}

// decoration(it) = it * it 
val plusFourThenPow = plus(4) decorateLeft { it * it }

println( plusFourThenPow(5) ) // { it * it }( 4 + 5 ) = 81

---

bind & composite

val plusTwo = { x: Int -> x + 2 }
val plusTen = { x: Int -> x + 10 }

//val plusTwelve = { x -> plusTen( plusTwo( x ) ) }
val plusTwelve = plusTwo composite plusTen //<=> plusTen compositeLeft plusTwo

// { x -> println( plusTwelve( x ) ) }.invoke( 6 )
plusTwelve composite ::println bind 6 // output: 18

---

bindOn & compositeOn

val modulo = runc<Int,Runction<Int,Boolean,Boolean,Boolean>,Int,Int> { b ->
    runc { a ->
        a % b == 0
    }
}

val isOdd = modulo(2) compositeOn { not() }

0..9 bindOn
        { toList() } bindOn
        { this::filter bind isOdd } bind ::println
//output: [1, 3, 5, 7, 9]

---

boolean expression

( 9 > 8 ) <Unit> {
    ifTrue { "It's True!" bind ::println }
    ifFalse { "It's False!" bind ::println }
}
//output: It's True!