First adapti dojo =D

telephone_spec.rb

require 'rspec'
require_relative '../telefone'

describe TelephoneDecoder do
	it { subject.decode("LOVE").should eql "5683" }
	it { subject.decode("ADAPTI").should eql "232784" }
	it { subject.decode("1-HOME-SWEET-HOME").should eql "1-4663-79338-4663" }
	it { subject.decode("MY-MISERABLE-JOB").should eql "69-647372253-562" }
end

TelephoneDecoder.rb

class TelephoneDecoder
  Codes = {'abc'=>2,
           'def'=>3,
           'ghi'=>4,
           'jkl'=>5,
           'mno'=>6,
           'pqrs'=>7,
           'tuv'=>8,
           'wxyz'=>9}

  def decode(word)
    output = ''
    word.downcase.each_char { |c| output += number_of c }
    output
  end

  private
    def number_of(char)
      Codes.each_pair do |key,value|
        return value.to_s if key.include? char
      end

      char
    end
end