ta-scroll="" href="#element-change-watch"><h5><i>4.2 &nbsp; Element Change Watch</i></h5></a><a class="section" data-scroll="" href="#clojure-protocols"><h5><i>4.3 &nbsp; Clojure Protocols</i></h5></a></li><li><a class="chapter" data-scroll="" href="#selection"><h4>5 &nbsp; Selection</h4></a><a class="section" data-scroll="" href="#by-index"><h5><i>5.1 &nbsp; by index</i></h5></a><a class="section" data-scroll="" href="#by-value"><h5><i>5.2 &nbsp; by value</i></h5></a><a class="section" data-scroll="" href=