Main function of frequency table construction

createFreqTable.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"regexp"
	"strings"

	flags "github.com/jessevdk/go-flags"
)

var opts struct {
	File string `short:"f" long:"file" description:"a file to read strings from."`
}

func main() {
	//interpret the CL stdin
	flags.Parse(&opts)
	file, err := ioutil.ReadFile(opts.File)
	checkErr(err)
	//create an array of strings that is split by the newline character
	splitByWord := strings.Split(string(file), " ")
	table := createFreqTable(splitByWord)
	fmt.Println("The frequency table is")
	wordCount := 0
	for _, node := range table.keys() {
		wordCount++
		fmt.Printf("%v -> %v \n", node.key, node.val)
	}
	fmt.Println("The number of unique words is", wordCount)
}