empty function

bool empty(dynamic v)

Return true if the value is false, or empty.

Implementation

bool empty(v) {
  if (v == null) return true;
  if (v is String) return v.isEmpty;
  if (v is List) return v.isEmpty;
  if (v is Map) return v.isEmpty;
  if (v == 0) return true;
  if (v == false) return true;
  return false;
}