ngrams.go

package main

import (
	"fmt"
	"strings"
)

func nGram(text string, n int) (grams []string) {
	words := strings.Split(text, " ")
	limit := len(words) - (n - 1)
	for i := 0; i < limit; i++ {
		grams = append(grams, strings.Join(words[i:(i+n)], " "))
	}

	return
}

func main() {
	grams := nGram("The fox jumps over the lazy dog", 3)
	fmt.Printf("%q", grams) // => ["The fox jumps" "fox jumps over" "jumps over the" "over the lazy" "the lazy dog"]
}