a666666 https://blog.hatena.ne.jp/a666666/ @kyanny's blog https://blog.kyanny.me/ String#each_codepoint と Fixnum#to_s に基数 16 を渡す。 $ ruby -v ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin14] $ irb irb(main):001:0> "ほげ".each_codepoint.to_a => [12411, 12370] irb(main):002:0> "ほげ".each_codepoint.map{|n| n.to_s(16) } => ["307b", "3052"] irb(main):003:0> ["\u307b", "\u3052"]… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kyanny.me%2Fentry%2F2015%2F10%2F25%2F221310" title="Ruby で文字列の Unicode コードポイントと \uXXXX 表記用の 16 進数を得る - @kyanny&#39;s blog" 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 2015-10-25 22:13:10 rich https://blog.kyanny.me/entry/2015/10/25/221310 1.0 100%