gistfile1.go

func main() {
	startTime := time.Now()

	//Load our name databases in a goroutine
	namesChannel := make(chan map[string]bool)
	go func() {
		fmt.Println("Start loading name database")
		//send the result back over then channel
		namesChannel <- loadNames("male.names")
		namesChannel <- loadNames("female.names")
		fmt.Println("Loaded Names")
	}()

	//Fetch and extract the people on the frontpage in another goroutine
	extractChannel := make(chan []string)
	go func() {
		fmt.Println("Fetch pinterest page")
		pageContent, _ := getFrontPage()
		//Extract the names of the people pinning and those liking the pins
		pinners := getPinners(pageContent)
		likers := getPinCommenters(pageContent)

		//Put the first names of all into one list.
		//Go doesn't seem to have a builtin list concat function.
		firstNames := []string{}
		for i := range pinners {
			firstNames = append(firstNames, strings.Split(pinners[i], " ")[0])
		}
		for i := range likers {
			firstNames = append(firstNames, strings.Split(likers[i], " ")[0])
		}

		extractChannel <- firstNames
		fmt.Println("Extract names from front page")
	}()

	//Wait for our goroutines to complete and then compute the results
	var male map[string]bool = <-namesChannel
	var female map[string]bool = <-namesChannel
	firstNames := <-extractChannel // can still use type inference

	fmt.Println("Building Stats")

	//Test the names with our primitive gender guesser

	//We will store the names for each match (or lack thereof) in a map of lists
	results := map[string][]string{
		"Male":         []string{},
		"Female":       []string{},
		"Unisex":       []string{},
		"Undetermined": []string{},
	}

	//Test if a name is male, female, both or unknown
	for _, name := range firstNames {
		isMale := false
		isFemale := false
		name = strings.ToUpper(name)

		if male[name] {
			isMale = true
		}
		if female[name] {
			isFemale = true
		}

		switch {
		case isMale && isFemale:
			results["Unisex"] = append(results["Unisex"], name)
		case isMale:
			results["Male"] = append(results["Male"], name)
		case isFemale:
			results["Female"] = append(results["Female"], name)
		case true:
			results["Undetermined"] = append(results["Undetermined"], name)
		}
	}

	//Print out results
	endTime := time.Now()
	fmt.Println("Results at", time.Now(), "Computed in", endTime.Sub(startTime))
	fmt.Println(len(results["Female"]), " Women")
	fmt.Println(len(results["Male"]), " Men")
	fmt.Println(len(results["Unisex"]), " Unisex names:", results["Unisex"])
	fmt.Println(len(results["Undetermined"]), " Undetermined:", results["Undetermined"])
}