Trie in Go test

trie.go

package main

import (
	"fmt"
	"github.com/MathieuTurcotte/go-trie/gtrie"
	"log"
	"os"
	"strings"
	"bufio"
	"io"
	"math/rand"
	"time"
)

func main()  {
	log.Println("starting procedure")

	words_dictionary := readWords("words.txt") // 610000 words https://www.dropbox.com/s/5uiduyiddhk4vr1/words.txt?dl=0

	trie, err := gtrie.Create(words_dictionary)

	if err != nil {
		log.Fatal(err)
	}

	fmt.Println("\nthe entire dictionary is", len(words_dictionary), "words\n")

	shuffled_dictionary := words_dictionary
	shuffle(shuffled_dictionary)

	var slice_dictionary []string = shuffled_dictionary[1:25000]

	// fmt.Println(slice_dictionary, "\n")

	for _, word := range slice_dictionary {
		if !trie.Accepts(word) {
			log.Println(word, "was not found")
		}
	}

	log.Println("\nprocedure completed")
}

func readWords(filename string) (words []string) {
	file, err := os.Open(filename)
	if err != nil {
		log.Fatal(err)
	}
	defer file.Close()

	reader := bufio.NewReader(file)

	for {
		word, rerr := reader.ReadString('\n')
		if rerr != nil {
			if rerr == io.EOF {
				break
			} else {
				log.Fatal(err)
			}
		}
		words = append(words, strings.TrimSpace(word))
	}
	return
}

func shuffle(arr []string) {
	t := time.Now()
	rand.Seed(int64(t.Nanosecond())) // no shuffling without this line

	for i := len(arr) - 1; i > 0; i-- {
		j := rand.Intn(i)
		arr[i], arr[j] = arr[j], arr[i]
	}
}