I call this function `ISPRESENT` to test for values that are not null, empty strings/blanks or zeros.
me@jaykilleen.com wrote this about 3 years ago and it was last updated about 3 years ago.
let
f = (x) =>
let
x = if
x = null then false
else if
x = "" then false
else if
x = 0 then false
else
true
in
x
in
f