module Numb3rs
module Languages
class EnUk
def initialize
@cached = {
0 => "zero",
1 => "one",
2 => "two",
3 => "three",
4 => "four",
5 => "five",
6 => "six",
7 => "seven",
8 => "eight",
9 => "nine",
10 => "ten",
11 => "eleven",
12 => "twelve",
13 => "thirteen",
14 => "fourteen",
15 => "fifteen",
16 => "sixteen",
17 => "seventeen",
18 => "eighteen",
19 => "nineteen",
20 => "twenty",
30 => "thirty",
40 => "forty",
50 => "fifty",
60 => "sixty",
70 => "seventy",
80 => "eighty",
90 => "ninety",
100 => "a hundred",
1_000 => "a thousand",
1_000_000 => "a million",
1_000_000_000 => "a billion",
1_000_000_000_000 => "a trillion",
}
end
def in_words(number, *args)
return "minus " + in_words(-number) if number < 0
@cached[number] || returning("") do |s|
s << case number
when 0..99 then ([ in_words(number - number % 10), in_words(number % 10) ] - %w(zero)).join("-")
when 100..999 then partial_words(number, 100)
when 1_000..999_999 then partial_words(number, 1000)
when 1_000_000..999_999_999 then partial_words(number, 1_000_000)
else "many"
end
s.sub! /^one /, "a " unless number > 1_000_000 and number % 1_000_000 > 100
@cached[number] = s if number < 1000 and @cached[number].nil?
end
end
protected
def partial_words(number, magnitude)
([ in_words(number / magnitude) + " " + in_words(magnitude).sub(/^a(n)? /, ""), in_words(number % magnitude) ] - %w(zero)).join(number % magnitude < 100 ? " and " : ", ")
end
end
end
end
