t; character(0)</span>
<span class="co">#&gt; </span>
<span class="co">#&gt; [[5]]</span>
<span class="co">#&gt; [1] "hadley"</span>
<span class="co">#&gt; </span>
<span class="co">#&gt; [[6]]</span>
<span class="co">#&gt; [1] "hadley"</span>
<span class="co">#&gt; </span>
<span class="co">#&gt; [[7]]</span>
<span class="co">#&gt; [1] "hadley"</span>
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<span class="co">#&gt; [[8]]</span>
<span class="co">#&gt; [1] "hadley"</span>
<span class="co">#&gt; </span>
<span class="co">#