Package Modules and Receiver Functions

If we have 2 files:

> ls .
main.go
deck.go

We can use the logic in deck.go in main.go as so:

// deck.go
package main

import "fmt"

// Create a new type of 'deck'
// which is a slice of strings
type deck []string

// function using a receiver 'deck'
func (d deck) print() {
  for i, card := range d {
    fmt.Println(i, card)
  }
}

// main.go

package main

import "fmt"

func main() {
  cards := deck{newCard(), newCard(), "Ace of Diamonds"}
  
  // using print method from deck module
  cards.print()
}

func newCard() string {
  return "Five of Diamonds"
}