How to convert List of Varients to List of Dictionary

Question

I have a usecase where there are two arrays : one is empty and second one has some values 
 Array1 : {"",""}, 
 Array2 : {1:1,2:2} 
 After removing null or empty values from Array1 using filter function filter(a!isNotNullorEmpty,Array1), I have got empty array which is of List of Varient type 
 Now I want to apply difference function difference(Array1,Array2) 
 Since both are different data types, im being thrown error as invalid types. 
 If I have any values in Array1 like {1:1}, it would be of type List of Dictionary, but now here it is List of Varient since nothing there in the Array. 
 How can I perform difference function operation now? Is there any workaround to convert list of varient to list of dictionary ?

Stefan Helzle · Answer

Something like this should do it. 
 cast(<YOUR_VALUE>, a!listType(type!Dictionary))

Jamuna · Answer

First of all, difference function is to return the values which is present in array 1 and not in array 2. Since first array is empty no need to call difference function itself. So do null check and if both array 1 and array 2 have values call difference function else return array 1.