>int</span> i, <span title="FSharpx.DataStructures.a">a</span> y, <a href="../FSharpx.DataStructures/BankersDeque`1.htm">BankersDeque&lt;a&gt;</a> q)</h4>
		<div class="content">O(n), worst case. Returns option deque with element updated by index. 



      
    </div>
	</div>
	<div id="uncons``1" class="method">
		<h4><span title="System.Tuple<a, BankersDeque<a>>">Tuple&lt;a, BankersDeque&lt;a&gt;&gt;</span> <strong>uncons&lt;a&gt;</strong>(<a href="../FSharpx.DataStructures/BankersDeque`1.htm">BankersDequ