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cassiomarques/privatising.rb

Created March 29, 2016 14:33
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privatising.rb
irb(main):014:0> foo = "I am foo"
=> "I am foo"
irb(main):015:0> foo.is_a? String
=> true
irb(main):016:0> module Kernel
irb(main):017:1> private :is_a?
irb(main):018:1> end
=> Kernel
irb(main):019:0> foo.is_a? String
NoMethodError: private method `is_a?' called for "I am foo":String
from (irb):19
from /Users/cassiommc/.rbenv/versions/2.2.2/bin/irb:11:in `<main>'
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