bout <em>data.table</em> and its
wonderful features, so as to design more extentions for <em>tidyfst</em>
in the future.</p>
<div class="section level3">
<h3 id="data">Data<a class="anchor" aria-label="anchor" href="#data"></a>
</h3>
<p>Because we want a more stable data source, here we’ll use the flight
data from the above <code>nycflights13</code> package.</p>
<div class="sourceCode" id="cb18"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="kw"><a href="https://rdrr.io/r