rtIndex == <span class="hljs-literal">null</span> ? func.<span class="hljs-property">length</span> - <span class="hljs-number">1</span> : +startIndex;
  <span class="hljs-keyword">return</span> <span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) {
    <span class="hljs-keyword">var</span> length = <span class="hljs-title class_">Math</span>.<span class="hljs-title function_">max</span>(<span class="hljs-variable language_">arguments</span>.<span class="hljs-property">length</span> 