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Ruby | Kernelにdefメソッドを定義してみる

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Kernelにdefメソッドを定義してみる

特に意味はありませんが Kernel module に def メソッドを定義してみます。

サンプルコード

module Kernel
  def def(msg)
    "my def #{msg}"
  end
end

print send :def, 'args' # => 'my def args'

# 通常の def キーワードと判断されて使えない
# def 'hoge'

結果

  • メソッドの定義は問題なくできる
  • sendで呼び出せば問題なく動作する
  • 直接呼び出そうとすると def キーワードと判断され end がないため syntax error が発生
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