ed as a means to pause briefly if output is expected to be slow to avoid pegging the CPU with a loop that does nothing.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-lines_both"><a href="#val-lines_both" class="anchor"></a><code><span><span class="keyword">val</span> lines_both : 
  <span><span class="optlabel">?sleep</span>:float <span class="arrow">&#45;&gt;</span></span>
  <span><span><span>(<span class="type-var">'stdin</span>, <a href="Core/index.html#type-stdout">Core.