package main

import (

	"fmt"

	"sort"

)

type StringSlice []string

func (this StringSlice) len() int {

	return len(this)

}

func (this StringSlice) less(i, j int) bool {

	return this[i] > this[j]

}

func (this StringSlice) swap(i, j int) {

	this[i], this[j] = this[j], this[i]

}

func (this StringSlice) search(str string) int {

	return sort.SearchStrings(this, str)

}

func main() {

	var str = StringSlice{"123", "999", "345", "987"}

	fmt.Println(str)

	sort.Strings(str)

	var index = str.search("999")

	fmt.Println(index)

	fmt.Println(str)

}