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<pre><span class="ruby-comment cmt"># File lib/rir/document.rb, line 46</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">ngrams</span>(<span class="ruby-identifier">n</span>)
<span class="ruby-identifier">window</span> = []
<span class="ruby-identifier">ngrams_array</span> = []
<span class="ruby-ivar">@words</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">w</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">window</span>.<span class="ruby-identifier">push</span>(<span class="ruby-identifier">w</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">window</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">n</span>
<span class="ruby-identifier">ngrams_array</span>.<span class="ruby-identifier">push</span> <span class="ruby-identifier">window</span>.<span class="ruby-identifier">join</span>(<span class="ruby-value str">" "</span>)
<span class="ruby-identifier">window</span>.<span class="ruby-identifier">delete_at</span>(<span class="ruby-value">0</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">ngrams_array</span>.<span class="ruby-identifier">uniq</span>
<span class="ruby-keyword kw">end</span></pre>
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