Function

You can use this code instead. 

a!localVariables(
  local!data: a!forEach(
    items: ri!array,
    expression: { value: fv!item }
  ),
  todatasubset(
    local!data,
    a!pagingInfo(
      startIndex: 1,
      batchSize: - 1,
      sort: a!sortInfo(field: "value", ascending: or(ri!ascending))
    )
  ).data.value
)

Isolate this in an expression rule and use it anywhere in your app.