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unbound_method_binding

🔁 Rebinding UnboundMethod for flexible composition​

Extract methods as UnboundMethod objects, modify or wrap them, and rebind to different classes or instances, enabling advanced method sharing patterns.

module Formatter
  def format_text(text)
    text.strip.upcase
  end
end

um = Formatter.instance_method(:format_text)
String.class_eval { define_method(:format_custom, um) }

" hello ".format_custom # => "HELLO"