Simple hash table implemention in ruby

hash_table_in_ruby.rb

# https://github.com/alexavlonitis
# Simple HashMap/HashTable implementation in ruby

class HashMap
  def initialize(table_size = 18)
    @table = Array.new(table_size)
  end

  def set(key, value)
    table_index = table_index(key)

    if @table[table_index]
      @table[table_index] << value
    else
      @table[table_index] = [value]
    end
  end

  def get(key)
    table_index = table_index(key)
    @table[table_index]
  end

  private

  def table_index(key)
    key.hash % @table.size
  end
end