class="method">
		<h4><a href="../FSharpx.DataStructures/BankersDeque`1.htm">BankersDeque&lt;a&gt;</a> <strong>update&lt;a&gt;</strong>(<span title="System.int">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 deque with element updated by index. 



      
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