Use case

usecase.go

package main

import "fmt"

func printString(foo string) {
	fmt.Println(foo)
}

func printLen(foo string) {
	fmt.Println(len(foo))
}

type foo struct {
	Value string
	Func  interface{}
}

func main() {
	var fools = []foo{
		foo{
			Value: "hello world",
			Func:  printString,
		},
		foo{
			Value: "goodbye world",
			Func:  printLen,
		},
	}

	for i := range fools {
		fools[i].Func.(func(foo string))(fools[i].Value)
	}

}