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-  <title>permute (Array)</title>
+  <title>rotate (Array)</title>
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-  <pre><span class="ruby-comment cmt"># File lib/facet/array/permute.rb, line 18</span>
-  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">permute</span>(<span class="ruby-identifier">prefixed</span>=[])
-    <span class="ruby-keyword kw">if</span> (<span class="ruby-identifier">length</span> <span class="ruby-operator">&lt;</span> <span class="ruby-value">2</span>)
-      <span class="ruby-comment cmt"># there are no elements left to permute</span>
-      <span class="ruby-keyword kw">yield</span>(<span class="ruby-identifier">prefixed</span> <span class="ruby-operator">+</span> <span class="ruby-keyword kw">self</span>)
-    <span class="ruby-keyword kw">else</span>
-      <span class="ruby-comment cmt"># recursively permute the remaining elements</span>
-      <span class="ruby-identifier">each_with_index</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">e</span>, <span class="ruby-identifier">i</span><span class="ruby-operator">|</span>
-        (<span class="ruby-keyword kw">self</span>[<span class="ruby-value">0</span>,<span class="ruby-identifier">i</span>]<span class="ruby-operator">+</span><span class="ruby-keyword kw">self</span>[(<span class="ruby-identifier">i</span><span class="ruby-operator">+</span><span class="ruby-value">1</span>)<span class="ruby-operator">..</span><span class="ruby-value">-1</span>]).<span class="ruby-identifier">permute</span>(<span class="ruby-identifier">prefixed</span><span class="ruby-operator">+</span>[<span class="ruby-identifier">e</span>]) { <span class="ruby-operator">|</span><span class="ruby-identifier">a</span><span class="ruby-operator">|</span> <span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">a</span> }
-      <span class="ruby-keyword kw">end</span>
-    <span class="ruby-keyword kw">end</span>
+  <pre><span class="ruby-comment cmt"># File lib/facet/array/rotate.rb, line 19</span>
+  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">rotate</span>(<span class="ruby-identifier">n</span>=<span class="ruby-value">1</span>)
+    <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">dup</span>.<span class="ruby-identifier">rotate!</span>(<span class="ruby-identifier">n</span>)
   <span class="ruby-keyword kw">end</span></pre>
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