intersection.go

package main

import "fmt"

func main() {
	strs := []string{"a", "b", "c"}
	strs2 := []string{"b", "c", "d"}
	fmt.Println(intersection(strs, strs2))
}

func intersection(strs1 []string, str2 []string) (result []string) {
	var m = map[string]bool{}
	for _, v := range append(strs1, str2...) {
		if _, ok := m[v]; ok {
			result = append(result, v)
		} else {
			m[v] = true
		}
	}
	return
}