Page 111, example tut_modules/vowel_finder_sum.rb
All this code with three classes including Summable
for only one line of output ?
Adding puts
to these two statements :
puts [1, 2, 3, 4, 5].sum
puts ("a".."m").sum
will produce all three sums in the same place :
% ruby -w tut_modules/vowel_finder_sum.rb
15
abcdefghijklm
euiooue