Methods to test whether an object is numeric or not.

gistfile1.rb

class Object

  # Test if the object is an integer.
  #
  # "54".is_i?     #=> true
  # "54_000".is_i? #=> true
  def is_i?
    !!Integer(self) rescue false
  end
  
  # Test if the object is a float.
  #
  # "54.3".is_f?     #=> true
  # "2_000.33".is_f? #=> true
  def is_f?
    !!Float(self) rescue false
  end
  
  # Test if the object is either an integer or a float.
  def is_numeric?
    is_i? || is_f?
  end
end