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POWhy does Ruby include? evaluate to nil?
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copied!<p>So, I'm a total nuby working through <a href="http://www.rubykoans.com/" rel="nofollow noreferrer">http://www.rubykoans.com/</a> and I'm stuck on about_scoring_project.rb. This is my stab at the score method. </p> <pre><code>def score(dice) score = 0; if dice.respond_to?("include?") then # add 1000 points if rolled 3 ones score += 1000 if dice.include?([1, 1, 1]) # add 100 points times die face value if rolled 3 of a number between 2 and 6 (2...6).each do |die| score += die*100 if dice.include?([die, die, die]) # award points for each 1 or 5 not a part of a set of 3 leftovers = dice - [1,1,1] leftovers -= [5,5,5] leftovers.each do |leftover| score += 100 if leftover == 1 score += 50 if leftover == 5 end end end score end class AboutScoringAssignment < EdgeCase::Koan def test_score_examples assert_equal 1150, score([1,1,1,5,1]) assert_equal 0, score([2,3,4,6,2]) assert_equal 350, score([3,4,5,3,3]) assert_equal 250, score([1,5,1,2,4]) end end </code></pre> <p>In the call to score from the first assert_equal, I would expect dice.include?([1,1,1]) to evaluate to true, but it's evaluating to nil (and score is returning 0 instead of 1150).</p> <p>I tried this separately...</p> <pre><code>require 'test/unit' class EnumerableTests < Test::Unit::TestCase def test_include my_enumerable = [1,1,1,5,1] assert true, my_enumerable.include?([1,1,1]) end end </code></pre> <p>...and the test passes, so I don't know why I'm getting nil in my score method. </p> <p>Anybody see what I'm doing wrong?</p>

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