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Forgiving ruby

05.01.2014
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#!/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.