s="code"><span class="keyword">end</span></code></pre><div class="info module top">
<div class="info-desc">
<p>List operations.</p>

<p>Some functions are flagged as not tail-recursive.  A tail-recursive
   function uses constant stack space, while a non-tail-recursive function
   uses stack space proportional to the length of its list argument, which
   can be a problem with very long lists.  When the function takes several
   list arguments, an approximate formula giving stack usage (in some
   unspecifie