An example of a hash made from just arrays

bastardhashing.rb

#!/usr/bin/env ruby

require 'pp'

class BastardHashing
  #Two arrays, index is the linking column 
  def initialize()
    @keys = Array.new
    @values = Array.new
  end 

  def add ( key, value )
    @keys.push(key)
    @values.push(value)
  end 

  def delete ( key )
    return nil if @keys.index(key).nil?
    @keys.delete_at(@keys.index(key))
    return @values.delete_at(@keys.index(key))
  end 

  def update ( key, value )
    return nil if @keys.index(key).nil?
    return @values[@keys.index(key)] = value
  end 

  def value ( key )
    return nil if @keys.index(key).nil?
    return @values[@keys.index(key)] 
  end 

  def list_keys
    return @keys
  end 

  def list_values
    return @values
  end 

end

myHash = BastardHashing.new

myHash.add("Peaches", 23) 
myHash.add("Oranges", 35) 
myHash.add("Mangos", 36) 
myHash.add("Pears", 21) 
myHash.add("Plums", 11) 

pp myHash.list_keys
pp myHash.list_values

pp myHash.value("Peaches")