kandu / go_currying

Create typesafe curried/uncurried versions of functions

Go Currying

Functions in this go module implement curring and uncurring. This module depends on Go's new generics language feature, so Go 1.18 or newer is required.

Installation

To install go_curring module, you can use the command below

go get -u github.com/kandu/go_currying@0.1

Quick start

package main

import "github.com/kandu/go_currying/curry0"
import "github.com/kandu/go_currying/curry"
import "fmt"
import "strings"

func main() {
    print_str_upcase_n_times:= func(str string, upcase bool, n int) {
        for i := 0; i < n; i++ {
            if upcase {
                println(strings.ToUpper(str))
            } else {
                println(str)
            }
        }
    }

    curried:= curry0.Curry3(print_str_upcase_n_times)

    hi:= curried("hi")(false)
    HI:= curried("hi")(true)

    hi(4)
    HI(3)

    uncurried:= curry0.Uncurry3(curried)
    rearranged:= curry0.Curry2(func(str string, n int) {
        uncurried(str, false, n)
    })

    uncurried("uncurried", true, 2)
    rearranged("rearranged")(2)

    println("\n---\n")

    checkLen:= func(length int, str string) bool {
        return length == len(str)
    }

    lenIsTen:= curry.Curry2(checkLen)(10)
    
    str:= "hi"
    fmt.Printf("the length of \"%s\" is 10, %v\n", str, lenIsTen(str))
    str= "0123456789"
    fmt.Printf("the length of \"%s\" is 10, %v\n", str, lenIsTen(str))
}

will print out

hi
hi
hi
hi
HI
HI
HI
UNCURRIED
UNCURRIED
rearranged
rearranged

---

the length of "hi" is 10, false
the length of "0123456789" is 10, true