hiring programmer

class A
  attr_reader :exp, :github, :langs, :apply, :age, :cand_index
  @@cand_hsh = Hash.new(0)
  @@cand_counter = 1
  @@cand_index_ext = 1

  def initialize(exp,github,langs,apply,age)
    @exp = exp
    @github = github
    @langs = langs
    @apply = apply
    @age = age
    @cand_index = "c00" << @@cand_index_ext.to_s

    @@cand_counter += 1
    @@cand_index_ext += 1
    process_data
  end

  def process_data
    details = {}
    details = { :exp => @exp,
                :github => @github,
                :langs => @langs,
                :apply => @apply,
                :age => @age
    }

    @@cand_hsh[@cand_index.to_sym] = details
  end

  def suitability
    cand_values = @@cand_hsh[@cand_index.to_sym].values
    cand_langs = cand_values.delete_at(2)
    requirs = [2, 500, "didnot", 25]
    #exp = 2 github = 500 apply = no age = 25
    lang_requir = "ruby"
    @cand_points = Array.new(0)
    counter = 0

    cand_values.each do |x|
      @cand_points << 1 if x >= requirs[counter]
      counter += 1
    end

    cand_langs.include?(lang_requir) ? (@cand_points << 1 and @ruby = "YES" and @add_points = cand_langs.size * 0.5 - 0.5) : (@ruby = "NO" and @add_points = cand_langs.size * 0.5)
    @cand_points = @cand_points.inject(:+)

    write2file
  end

  def suitable?
    (@cand_points >= 4 and @age >= 25 and @apply and (@ruby == "YES") and (@exp >= 2 or @github >= 500)) ? "YES" : "NO"
  end

  def write2file
    langs = ""
    @langs.each {|lang| langs << lang + ". "}

    File.open("#{@cand_index}.txt", "w+") do |file|
        file.write("
Candidate det info
==================
experience = #{@exp} years;
Ruby lang? = #{@ruby};
github points = #{@github} points;
applied before = #{@apply};
age = #{@age} years;
languages working with = #{langs}

Candidate points - #{@cand_points} points.
Additional points for multi-lang programming - #{@add_points}
TOTAL = #{@cand_points + @add_points} points.

PROPER CANDIDATE? - #{suitable?}
=================="
)
    end

    File.open("#{@cand_index} hash.txt", "w+") do |file|
        file.write(@@cand_hsh[@cand_index.to_sym])
    end
  end
end

cand001 = A.new(2,503,%W(ruby python java php),"didnot",30)
cand002 = A.new(4,666,%W(ruby java lisp pascal),"did",16)
cand003 = A.new(21,2013,%W(code drakon foxpro java javascript lisp),"didnot",51)

cand003.suitability