Private Function to Check Empty Fields on Button Click

Hi,

Is it possible to create a function and pass it an array of fields to check if any of them are empty?

My example is that I want to send a send a task to outlook using integromat, but I don't want the task to send unless all fields are complete.

I have a huge 

if field1 = "" or field2 = "" or field3 = ""

but I have multiple instances where I check fields like this so it would be good to have a function I could pass an array to that would check if any of the fields are empty.

I got started with 

function checkEmptyFields(fields : array) do

end;

and I get an unknown type on the array.

any help will be much appreciated!