Greedy algorithm for removing whitespaces from text

remove-whitespices

package main

import (
	"github.com/sisteamnik/GoOse"
	"io/ioutil"
	"regexp"
	"strings"
)

var u = "http://www.itnews.com/drives/86430/want-100tb-disk-drive-youll-have-wait-til-2025"

func main() {
	g := goose.New()
	article := g.ExtractFromUrl(u)

	println("content", article.CleanedText)

	str := clean(article.CleanedText)

	ioutil.WriteFile("out.txt", []byte(str), 0777)
}

func clean(str string) string {
	var normalizeWhitespaceRegexp = regexp.MustCompile(`[ \r\f\v\t]+`)
	str = normalizeWhitespaceRegexp.ReplaceAllString(str, " ")

	strArr := strings.Split(str, "\n")
	resArr := []string{}

	for i, v := range strArr {
		v = strings.TrimSpace(v)
		if v != "" {
			resArr = append(resArr, v)
		} else if strArr[i-2] != "" {
			resArr = append(resArr, "")
		}
	}

	str = strings.Join(resArr, "\n")

	//in the future may be used as markdown paragraph
	var normalizeNl = regexp.MustCompile(`\n\n[\n]+`)
	str = normalizeNl.ReplaceAllString(str, "\n\n")

	return str
}