func getArticle(client redis.Client, page int, order string) []map[string]string {
	if order == "" {
		order = "score:"
	}

	start := (page - 1) * ARTICLES_PER_PAGE
	end := start + ARTICLES_PER_PAGE - 1

	ids, err := client.Zrevrange(order, start, end)
	if err != nil {
		log.Fatal("Zrevrange エラーだよ", err.Error())
	}

	articles := make([]map[string]string, 0)
	for _, id := range ids {

		articleData := make(map[string]string, 0)
		if err := client.Hgetall(string(id), articleData); err != nil {
			log.Fatal("Hgetall エラーだよ", err.Error())
		}
		articleData["id"] = string(id)

		articles = append(articles, articleData)
	}

	return articles
}