Mega Code Archive

 

Categories / Ruby / Number

 

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