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Last active May 9, 2018 02:02
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  1. lucasmazza revised this gist May 9, 2018. 1 changed file with 5 additions and 0 deletions.
    5 changes: 5 additions & 0 deletions 01.md
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    ```
    $ ruby thing.rb
    [Calculator::LoggerDecorator, Calculator, Object, Kernel, BasicObject]
    Calculator#div(10, 2) => 5
    ```
  2. lucasmazza created this gist May 9, 2018.
    27 changes: 27 additions & 0 deletions mimito.rb
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    module MagicLog
    def self.extended(receiver)
    decorator = Module.new
    receiver.prepend decorator
    receiver.const_set(:LoggerDecorator, decorator)
    end

    def log(name)
    self::LoggerDecorator.define_method(name) do |*args|
    result = super(*args)
    puts "#{self.class.name}##{name}(#{args.map(&:inspect).join(", ")}) => #{result}"
    result
    end
    end
    end

    class Calculator
    extend MagicLog

    log :div
    def div(x, y)
    x / y
    end
    end

    p Calculator.ancestors
    Calculator.new.div(10, 2)