want to disable a button using and(expression1, expression2)https://community.appian.com/discussions/f/general/19880/want-to-disable-a-button-using-and-expression1-expression2Hi Team, I have some data in array like Data=[[taskid=1,taskdone=true,comments=&quot;ABCD&quot;],[taskid=2,taskdone=false,comments=&quot;XYZ&quot;]] Now I want to disable dynamically like, if in the array all indexes have taskdone=true, then only button will be enableden-USTelligent Community 12RE: want to disable a button using and(expression1, expression2)https://community.appian.com/thread/77677?ContentTypeID=1Sun, 08 Nov 2020 08:11:07 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:85fc10f4-c133-448c-b4ce-4e112fa9eaecStefan Helzle<p>It think &quot;not(and(local!data.taskdone))&quot; should do it. Play a bit around to find the right combination. In general you can give and() any number of boolean values. Keep in mind that and() is not happy about null values.</p><div style="clear:both;"></div>