v>
</div>
<div id="consider-duplicates" class="section level2">
<h2 class="hasAnchor">
<a href="#consider-duplicates" class="anchor"></a>Consider duplicates</h2>
<p>Let’s say that you had already downloaded some PDFs, but weren’t sure and didn’t want to download them again. You could use <code><a href="../reference/check_for_existence.html">heapsofpapers::check_for_existence()</a></code> to check.</p>
<div class="sourceCode" id="cb5"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span 