aaronpk/nil.rb

Created July 30, 2013 21:31

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nil.rb

	class NilClass
	def [](key)
	nil
	end
	end

	payload = nil
	puts payload['pull_request']['base']['ref'].inspect

	$ ruby test.rb
	nil

kenichi commented Jul 30, 2013

this might better suit your needs:

class Hash

  def deep_fetch *args
    k = args.shift
    key?(k) ? (self[k].respond_to?(:deep_fetch) ? self[k].deep_fetch(*args) : self[k]) : nil
  end

end

>> h = { foo: { bar: { baz: 42}, bat: { baz: 43} }}
=> {:foo=>{:bar=>{:baz=>42}, :bat=>{:baz=>43}}}
>> h.deep_fetch :foo, :bar, :baz
=> 42
>> h.deep_fetch :foo, :bart, :baz
=> nil
>> h.deep_fetch :foo, :bat, :baz
=> 43
>> h.deep_fetch :foot, :bat, :baz
=> nil

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