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takahashilabo/gist:5411365

Last active December 16, 2015 09:09
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count the number of words in a string
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gistfile1.rb
class String
def count_the_number_of_words_in_a_string(word, pos = 0, num = 0)
pos = self.index(word, pos)
return num if pos == nil
count_the_number_of_words_in_a_string(word, pos + 1, num + 1)
end
end
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