project-euler/Sidef/017 Number letter counts.sf

#!/usr/bin/ruby

# Author: Daniel "Trizen" Șuteu
# License: GPLv3
# Website: https://github.com/trizen

# If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.
# If all the numbers from 1 to 1000 (one thousand) inclusive were written out in words, how many letters would be used?

# https://projecteuler.net/problem=17

# Runtime: 0.357s

var lingua_num = frequire('Lingua::EN::Numbers');

var sum = 0;
range(1, 1000).each { |i|
    sum += lingua_num.num2en(i).count(/[a-z]/);
}
say sum;