View this page in the latest version of Appian. a!isNullOrEmpty() Function Share Share via LinkedIn Reddit Email Copy Link Print On This Page Function Returns true if the value is null, an empty string, or an empty list. Otherwise returns false. See also: if() isnull() not() a!isNotNullOrEmpty() Parameters Keyword Type Description value Any Type Value to be checked. Returns Boolean Usage considerations Replace if() and isnull() expressions with a!isNullorEmpty This function is similar to the behavior of using if() and isnull() to check for the absence of a value or an empty string or list. For example, you could create an expression using if() and isnull(): 1 2 3 4 5 6 7 or( or(tostring(ri!input) = "", isnull(ri!input)), if(isnull(ri!input), true, length(a!flatten(ri!input)) = 0 ) ) Or you could use a!isNullorEmpty(), which requires fewer lines of code: 1 a!isNullOrEmpty(ri!input) Examples 1 a!isNullOrEmpty(togroup(null)) Returns true. 1 a!isNullOrEmpty("") Returns true. 1 a!isNullOrEmpty({1,2,3,4}) Returns false. 1 a!isNullOrEmpty(cast(recordType!Address, null)) Returns true. 1 a!isNullOrEmpty(recordType!Address) Returns false. Feature compatibility The table below lists this function's compatibility with various features in Appian. Feature Compatibility Note Portals Compatible Offline Mobile Compatible Sync-Time Custom Record Fields Compatible Can be used to create a custom record field that only evaluates at sync time. Real-Time Custom Record Fields Incompatible Custom record fields that evaluate in real time must be configured using one or more Custom Field functions. Process Reports Incompatible Cannot be used to configure a process report. Process Events Incompatible Cannot be used to configure a process event node, such as a start event or timer event. Feedback Was this page helpful? SHARE FEEDBACK Loading...