Easy way to keep your debugging logs in a array + outputing to Rails.logger, useful when executing from the console

array_logger.rb

module ScriptUtils
  class ArrayLogger < Array

    def initialize(&blk)
      @block = if block_given?
        blk
      else
        ->(msg){ Rails.logger.info(msg) }
      end
    end

    def <<(msg)
      @block.call(msg)
      super(msg)
    end
    alias_method :write, :<<

    def print(&blk)
      (blk || @block).call join("\n")
    end
  end
end

logs in array + Rails.logger.rb

logs = (str || [])
logs.instance_eval { def <<(v); Rails.logger.info(v) && super(v); end }

while (doing_crasy_things) do
  # the next line will output with Rails.logger.info + add the line to the array
  logs << "This line failed because ... "
end

puts logs * "\n"