Robot Has No Heart

Xavier Shay blogs here

A robot that does not have a heart

Object#send_with_default

Avoid those pesky whiny nils! send_with_default won’t complain.

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"hello".send_with_default(:length, 0)      # => 5
    nil.send_with_default(:length, 0)      # => 0
"hello".send_with_default(:index, -1, 'e') # => 1

So sending parameters is a little clunky, but I don’t reckon’ you’ll want to do that much. Here is the extension you want:

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module CoreExtensions
  module Object
    def send_with_default(method, default, *args)
      !self.nil? && self.respond_to?(method) ? self.send(*args.unshift(method)) : default
    end
  end
end

Object.send(:include, CoreExtensions::Object)

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