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kamipo/undef.rb

Created April 22, 2020 08:46
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undef.rb
puts RUBY_VERSION
module Rails
end
def Rails.root; :defined_root end
p defined?(Rails.root)
Rails.instance_eval { undef :root }
p defined?(Rails.root)
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kamipo commented Apr 22, 2020 

% ruby undef.rb
2.8.0
"method"
"method"

% ruby undef.rb
2.7.0
"method"
nil

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