Compare two floats for a certain precision : Float Extension « Number « Ruby

1. Ruby
2. Number
3. Float Extension

Compare two floats for a certain precision

class Float
  EPSILON =1e-6 #0.000001

  def ==(x)
    (self-x).abs < EPSILON
  end

  def equals?(x,tolerance=EPSILON)
    (self-x).abs < tolerance
  end

end

x = 1000001.0/0.003
y = 0.003*x
if y == 1.0 # Using the new ==
  puts "yes" # Now we output "yes"
else
  puts "no"
end

flag1 = (3.1416).equals?Math::PI          # false
flag2 = (3.1416).equals?(Math::PI,0.001)  # true

 

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