Module: CousinRoman

Defined in:
lib/cousin_roman.rb,
lib/cousin_roman/roman.rb,
lib/cousin_roman/arabian.rb,
lib/cousin_roman/version.rb,
lib/cousin_roman/string_extension.rb,
lib/cousin_roman/integer_extension.rb

Defined Under Namespace

Modules: Arabian, IntegerExtension, Roman, StringExtension

Constant Summary collapse

LITERALS = 
[
  'i', 'I',
  'v', 'V',
  'x', 'X',
  'l', 'L',
  'c', 'C',
  'd', 'D',
  'm', 'M'
]
ONES = 
{
  'i' => 1,
  'x' => 10,
  'c' => 100,
  'm' => 1000
}
FIVES = 
{
  'v' => 5,
  'l' => 50,
  'd' => 500,
}
SUBTRACTIVES = 
{
  'iv' => 4,
  'ix' => 9,
  'xl' => 40,
  'xc' => 90,
  'cd' => 400,
  'cm' => 900,
}
FACTORS = 
ONES.merge(FIVES).merge(SUBTRACTIVES)
VERSION = 
"1.0.8"

Class Method Summary collapse

Class Method Details

.literals_for_pow(pow) ⇒ Object 



42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/cousin_roman.rb', line 42

def self.literals_for_pow(pow)
  one, five = ONES.keys[pow], FIVES.keys[pow]
  subtractives = if pow.between? 0, 2
                   skeys = SUBTRACTIVES.keys
                   { 4 => skeys[pow*2], 9 => skeys[pow*2 + 1] }
                 else
                   nil
                 end

  { one: one, five: five, subtractives: subtractives }
end