Contents

module BookKeeping
  VERSION = 2
end

class BaseConverter
  def self.convert(base_from, number_array, base_to)
    fail ArgumentError if invalid_inputs?(base_from, number_array, base_to)
    return [] unless number_array.any?
    number_in_canonical_base = convert_to_canonical_base(number_array, base_from)
    convert_from_canonical_base(number_in_canonical_base, base_to)
  end

  private_class_method

  def self.invalid_inputs?(base_from, number_array, base_to)
    number_array.any? { |number| number < 0 || number >= base_from } ||
      base_from <= 1 || base_to <= 1
  end

  def self.convert_to_canonical_base(number_array, base)
    total = 0
    number_array.reverse.each_with_index do |number, index|
      total += number * base**index
    end
    total
  end

  def self.convert_from_canonical_base(number, base_to)
    result = []
    current_number = number
    while current_number >= base_to
      result << current_number % base_to
      current_number /= base_to
    end
    result << current_number % base_to
    result.reverse
  end
end

Version data entries

339 entries across 339 versions & 1 rubygems

Version	Path
trackler-2.0.6.20	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.19	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.18	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.17	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.16	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.15	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.14	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.13	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.12	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.11	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.10	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.9	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.8	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.7	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.6	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.5	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.4	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.3	tracks/ruby/exercises/all-your-base/example.rb
trackler-2.0.6.2	tracks/ruby/exercises/all-your-base/example.rb