murajun1978 https://blog.hatena.ne.jp/murajun1978/ Murajun's Style https://murajun1978.hatenadiary.com/ Ruby module Enumerableメソッドでいっぱつ解決 # 1から100までの数値だけを取得したい場合 [1, 30, 4000, 10, 50, 8000].grep(1..100) # => [1, 30, 10, 50] # String型のみ取得したい場合 [100, "murajun", 40, 100000, "murajun1978"].grep(String) # => ["murajun", "murajun1978"] # 正規表現 [100, "murajun", 40, 100000, "murajun1978"].grep(/\d+\Z/) # => ["muraj… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmurajun1978.hatenadiary.com%2Fentry%2F2014%2F09%2F19%2F230403" title="Arrayで指定範囲のデータを取得するヘ(^o^)ノ - Murajun&#39;s Style" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2014-09-19 23:04:03 rich https://murajun1978.hatenadiary.com/entry/2014/09/19/230403 1.0 100%