toyoshi https://blog.hatena.ne.jp/toyoshi/ 旧toyoshiの日記 https://toyoshi.hatenadiary.org/ Ruby メモ irb(main):034:0* class HelloWorld irb(main):035:1> def initialize irb(main):036:2> p "Hello World" irb(main):037:2> end irb(main):038:1> end => nil irb(main):039:0> class_name = "HelloWorld" => "HelloWorld" irb(main):041:0> eval("#{class_name}.new") "Hello World" => #<HelloWorld:0x2d663c0> irb(ma… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftoyoshi.hatenadiary.org%2Fentry%2F20100921%2F1285032992" title="変数に入ってる値から動的にインタンスを生成 - 旧toyoshiの日記" 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 2010-09-21 10:36:32 rich https://toyoshi.hatenadiary.org/entry/20100921/1285032992 1.0 100%