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@@ -2487,6 +2503,9 @@
 <a id="__codelineno-52-7" name="__codelineno-52-7" href="#__codelineno-52-7"></a>    <span class="c1"># 直接遍历数组</span>
 <a id="__codelineno-52-8" name="__codelineno-52-8" href="#__codelineno-52-8"></a>    <span class="k">for</span> <span class="n">num</span> <span class="ow">in</span> <span class="n">nums</span><span class="p">:</span>
 <a id="__codelineno-52-9" name="__codelineno-52-9" href="#__codelineno-52-9"></a>        <span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span>
+<a id="__codelineno-52-10" name="__codelineno-52-10" href="#__codelineno-52-10"></a>    <span class="c1"># 同时遍历数据索引和元素</span>
+<a id="__codelineno-52-11" name="__codelineno-52-11" href="#__codelineno-52-11"></a>    <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">num</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">nums</span><span class="p">):</span>
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