Module: TurkishNumber

Defined in:
lib/turkish_number.rb,
lib/turkish_number/version.rb

Constant Summary collapse

MINIMUM_HANDLEABLE_NUMBER = 
0
MAXIMUM_HANDLEABLE_NUMBER = 
999_999_999_999
BREAKNUMBERS = 
[10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 1_000, 1_000_000, 1_000_000_000].sort!.reverse!.freeze
MAPPINGS = 
{
  0 => 'sıfır',
  1 => 'bir',
  2 => 'iki',
  3 => 'üç',
  4 => 'dört',
  5 => 'beş',
  6 => 'altı',
  7 => 'yedi',
  8 => 'sekiz',
  9 => 'dokuz',
  10 => 'on',
  20 => 'yirmi',
  30 => 'otuz',
  40 => 'kırk',
  50 => 'elli',
  60 => 'altmış',
  70 => 'yetmiş',
  80 => 'seksen',
  90 => 'doksan',
  100 => 'yüz',
  1_000 => 'bin',
  1_000_000 => 'milyon',
  1_000_000_000 => 'milyar'
}.freeze
VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.to_words(number) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/turkish_number.rb', line 34

def self.to_words(number)
  begin
    number = Integer(number)
  rescue ArgumentError
    raise ArgumentError, "unable to convert #{number.inspect} to an Integer"
  end

  raise ArgumentError, "#{number} is too small" if number < MINIMUM_HANDLEABLE_NUMBER
  raise ArgumentError, "#{number} is too big" if number > MAXIMUM_HANDLEABLE_NUMBER

  return MAPPINGS.fetch(number) if MAPPINGS.key?(number)

  breaknumber = BREAKNUMBERS.detect { |b| b < number }
  unless breaknumber
    raise "no breaknumber found that is less than #{number}"
  end

  breaknumber_multiplier = number / breaknumber
  
  leftovers = number - (breaknumber * breaknumber_multiplier)

  components = [breaknumber]
  components << leftovers unless leftovers == 0
  components.unshift(breaknumber_multiplier) unless breaknumber_multiplier == 1

  components.map{|component_number| TurkishNumber.to_words(component_number)}.join(' ')
end