2014-04-22

Forgiving ruby

#!/usr/bin/env ruby

Author : Emad Elsaid (https://github.com/blazeeboy)

monkey batch, yup that a bad practice, but lets say that this is a proof of concept

we'll open the object class and handle the method missing situation, we'll claculate distance between the requested method and all methods available in object, then the nearest method if distance doesn't exceed certain number then execute it.

class Object
  def method_missing(meth, *args, &block)
    threshold = 3
    all_meth = methods.sort
    all_meth.sort_by! do |m| 
      string_distance m, meth
    end
    if string_distance(all_meth.first, meth) <= 3
      send all_meth.first, *args, &block
    else
      super
    end
  end

we'll calculate distance between 2 string by getting number of characters in 1 and not in 2 and number chars in 2 not in 1, sum the two differences and return that weight less weight is more similar method

  def string_distance(str1, str2)
    one_way = str1.to_s.chars - str2.to_s.chars 
    the_other_way = str2.to_s.chars - str1.to_s.chars 
    one_way.size + the_other_way.size
  end
end

UseCase ?

you can use nil instead of nil?

p "26512135".nil

you can use toi and tof instead of to_i and to_f

p "12123".tof

this way ruby will be more forgiving if you wrote method name with wrong character or less character or more with 1 character, when you increate the threshold it'll be more forgiving :D,

happy coding.