hoge.go

package main

import (
	"fmt"
)

type Hoges []struct {
	value string
}

func (h *Hoges) Filter(item string) bool {
	for i := 0; i < len(*h); i++ {
		if (*h)[i].value == item {
			return true
		}
	}
	return false
}

func main() {
	sample := Hoges{{"a"}, {"b"}, {"c"}}
	fmt.Println(sample.Filter("c"))
}