Golang React JS Technology Blog

Functions mess (recursive anonymous function) in Golang

Example

package main
 
import (
    "fmt"
    "reflect"
)
 
type Num interface{}
 
type List func(...Num) Num
 
func (list List) Apply(a Num) List {
    return func(values ...Num) Num {
        values = append([]Num{a}, values...)
        return list(values...)
    }
}
 
func wrapper(fn Num) List {
    return func(a ...Num) Num{
        return caller(fn, a)
    }
}
 
func caller(fn Num, args []Num) Num {
    var vs []reflect.Value
    for _, arg := range args {
        vs = append(vs, reflect.ValueOf(arg))
    }
    fun := reflect.ValueOf(fn)
    return fun.Call(vs)[0].Interface()
}
 
func mixture(elems []Num, fn Num) List {
    var list List = wrapper(fn)
    for _, elem := range elems {
        list = list.Apply(elem)
    }	
    return list
}
 
func addition(l int, m int, n int, o int) int {
    return l * m + n * o
}
 
func main() {
    fmt.Println(mixture([]Num{1, 2, 3}, addition)(4)) //14
    fmt.Println(mixture([]Num{1, 2, 3, 4}, addition)()) //14
}

Output

14
14
Most Helpful This Week
How to use array in Go Programming Language? Example: Fields and FieldsFunc from BYTES Package How to check UPPERCASE characters in a string in Golang? Different ways for Integer to String Conversions How to find length of Map in Go? Example to create custom error How to import and alias package names? Example to compare Println vs Printf How to append text to a file in Golang? How to fix race condition using Atomic Functions in Golang?