title: How to replace value in array of dictionary in swift?
body: <p>I have array of dictionary, I am trying to store it in NSuserdefault  but as it contain <code>&lt;null&gt;</code> app get crash, can we replace <code>&lt;null&gt;</code> with ""?
  Is there any way to resolve this issue?</p>
  
  <p>This is my array of dictionaries:</p>
  
  <pre><code>var array = (
                              {
                      ClinicID = "&lt;null&gt;";
                      "Patient_SurveyID" = 1956;
                      "Patient_Treatment_PlanID" = "&lt;null&gt;";
                      PhysicianID = "&lt;null&gt;";
                  },
                              {
                      ClinicID = "&lt;null&gt;";
                      "Patient_SurveyID" = 1956;
                      "Patient_Treatment_PlanID" = "&lt;null&gt;";
                      PhysicianID = "&lt;null&gt;";
                  },
      )
  </code></pre>