SpeakerDeckは はてブアプリ で閲覧し辛いがために`後で読む`的に無言ブクマが多くなるのではないか

anal.go

package main

import (
	"fmt"
	"sort"
)

func analyze_median(bc []BukumaComments) {
	var result []float64
	for _, v := range bc {
		result = append(result, v.PercentageOfComments)
	}
	var s sort.Float64Slice = result
	s.Sort()
	fmt.Println(s[1 : len(s)-1])
	fmt.Println("Ave: ", average(s[1:len(s)-1]), "\n")
}

func analyze(bc []BukumaComments) {
	var result []float64
	for _, v := range bc {
		result = append(result, v.PercentageOfComments)
	}
	fmt.Println(result)
	fmt.Println("Ave: ", average(result), "\n")
}

func average(f []float64) float64 {
	sum := 0.0
	for _, v := range f {
		sum += v
	}
	return sum / float64(len(f))
}

count.go

package main

type CountFunction func(*Response) BukumaComments

func (r *Response) count(f CountFunction) BukumaComments {
	return f(r)
}

type Response struct {
	Title      string
	Count      int
	Url        string
	Entry_url  string
	Screenshot string
	Eid        int
	Bookmarks  []Bookmark
}

type Bookmark struct {
	User      string
	Tags      []string
	Timestamp string
	Comment   string
}

main.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"sync"
)

const QueryUrl = "https://b.hatena.ne.jp/entry/jsonlite/%s"

var SlideshareLinks = []string{
	"http://www.slideshare.net/yutamorishige50/ss-41321443",         // 2909
	"http://www.slideshare.net/MoriharuOhzu/ss-14083300",            // 2001
	"http://www.slideshare.net/livesense/web-49772012",              // 1094
	"http://www.slideshare.net/matsunobu/ss-28303485",               // 1049
	"http://www.slideshare.net/WinderJason/ss-14830238",             // 1005
	"http://www.slideshare.net/masuda220/ss-14263541",               // 914
	"http://www.slideshare.net/TakeharuIgari/htmlcss-34506501",      // 906
	"http://www.slideshare.net/t_wada/exception-design-by-contract", // 905
	"http://www.slideshare.net/websig/websig32-teamlab",             // 842
	"http://www.slideshare.net/yusukehirao/javascript-28744332",     // 730
}

var SpeakerDeckLinks = []string{
	"https://speakerdeck.com/ken_c_lo/zurui-design",                                                                                         // 2752
	"https://speakerdeck.com/naoya/kai-fa-zu-zhi-manezimentofalsekotu",                                                                      // 1482
	"https://speakerdeck.com/naoya/webpuroguramatoshu-xue-falsejie-dian-sofalseru-rikou",                                                    // 1169
	"https://speakerdeck.com/mirakui/developer-productivity-in-cookpad",                                                                     // 1093
	"https://speakerdeck.com/ykmc09/enziniagana-qi-woshou-reteinaitositara-sokonihaitutaihe-gaarufalsedarou-aruihaitutaihe-ganaifalsedarou", // 1005
	"https://speakerdeck.com/isaoshimizu/monsutowozhi-eruinhurafalsejin-tokorekara",                                                         // 974
	"https://speakerdeck.com/ken_c_lo/webenziniafalsetamefalsewebsabisudezainshi-jian-jiang-zuo",                                            // 867
	"https://speakerdeck.com/kanny/miao-jian-shu-mo-falseroguwoiigan-zinisuruakitekutiya",                                                   // 829
	"https://speakerdeck.com/ken_c_lo/zuruidezaintekunituku2013-plus-semihuratuto-version",                                                  // 826
	"https://speakerdeck.com/shibayu36/hatenaburogutimufalsekai-fa-hurotogithub",                                                            // 814
}

var HatenaLinks = []string{
	"http://www.find-job.net/startup/api-2013",                    // 4510
	"http://hatenanews.com/articles/201212/12134",                 // 3568
	"http://hatenanews.com/articles/201507/23596",                 // 2999
	"http://chronicle.g.hatena.ne.jp/rikuo/20070404",              // 1487
	"http://d.hatena.ne.jp/ramyana/20081022/1224695284",           // 1479
	"http://d.hatena.ne.jp/naoya/20131013/1381651545",             // 1344
	"http://blog.hatenablog.com/entry/2015/12/29/153000",          // 1275
	"http://hatenanews.com/articles/201106/4302",                  // 1019
	"http://d.hatena.ne.jp/naoya/20130205/1360062070",             // 1019
	"http://www.itmedia.co.jp/news/articles/1303/01/news041.html", // 970
}

func main() {
	targets := [][]string{SlideshareLinks, SpeakerDeckLinks, HatenaLinks}
	var num int
	for _, v := range targets {
		num += len(v)
	}

	var wg sync.WaitGroup
	wg.Add(num)

	var ss, sp, ht []BukumaComments

	execute(SlideshareLinks, &ss, &wg)
	execute(SpeakerDeckLinks, &sp, &wg)
	execute(HatenaLinks, &ht, &wg)

	wg.Wait()

	for _, v := range ss {
		if v.PercentageOfComments > 0.3 {
			fmt.Println(v)
		}
	}
	for _, v := range ht {
		if v.PercentageOfComments > 0.3 {
			fmt.Println(v)
		}
	}

	fmt.Println("==== Slideshare Stats ====")
	analyze(ss)
	fmt.Println("==== SpeakerDeck Stats ====")
	analyze(sp)
	fmt.Println("==== 「はてな」 Stats ====")
	analyze(ht)

	fmt.Println("\n*****************************\n")

	fmt.Println("==== Slideshare(Median) Stats ====")
	analyze_median(ss)
	fmt.Println("==== SpeakerDeck(Median) Stats ====")
	analyze_median(sp)
	fmt.Println("==== 「はてな」(Median) Stats ====")
	analyze_median(ht)
}

func execute(t []string, bc *[]BukumaComments, wg *sync.WaitGroup) {
	for _, v := range t {
		go func(v string) {
			*bc = append(*bc, count(v))
			wg.Done()
		}(v)
	}
}

func count(target string) BukumaComments {
	url := fmt.Sprintf(QueryUrl, target)

	resp, err := http.Get(url)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
	var response Response
	json.NewDecoder(resp.Body).Decode(&response)

	result := response.count(countComments)

	if err != nil {
		panic(err)
	}
	return result
}

func countComments(r *Response) BukumaComments {
	var c, nc int
	for _, v := range r.Bookmarks {
		if len(v.Comment) == 0 {
			nc++
		} else {
			c++
		}
	}
	return BukumaComments{
		Title:                r.Title,
		Count:                r.Count,
		NumOfComments:        c,
		NumOfNoComments:      nc,
		PercentageOfComments: float64(c) / float64(c+nc),
	}
}

type BukumaComments struct {
	Title                string
	Count                int
	NumOfComments        int
	NumOfNoComments      int
	PercentageOfComments float64
}