import (
    "github.com/rakeeb-hossain/functools"
    "fmt"
)

type User struct {
	username     string
	hasPortfolio bool
}

var users = []User{
		{"gopher", true},
		{"rakeeb", false},
		{"jack", true}}

func main() {
    // Count users with linked portfolios
    fmt.Printf("num users with linked portfolios: %d", 
        functools.Count(users, func(u User) bool { return u.hasPortfolio }))

    // Print usernames of users with linked portfolios
    functools.ForEach(
        functools.Filter(users, func(u User) bool { return u.hasPortfolio }),
        func(u User) { fmt.Printf("%s has a linked portfolio\n", u.username) })
}