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
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