Essential Books

Changing any method

suggest change 
def hello
  puts "Hello readers"
end

hello # => "Hello readers"

def hello
  puts "Hell riders"
end

hello # => "Hell riders"
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Monkey patching:
* Monkey Patching in Ruby
* Changing an existing ruby method
* Changing a method with parameters
* Safe Monkey patching with Refinements
* Changing any method
* Extending an existing class
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