OCLOperators isEmpty
This page was created by Alexandra on 2017-08-13. Last edited by Edgar on 2025-08-31.
isEmpty () : Boolean
Returns true if self is empty - otherwise, returns false.
| Expression | Result |
|---|---|
| Sequence{2, 'a'}->isEmpty() | false |
| Sequence{null}->isEmpty() | false |
| Sequence{}->isEmpty() | true |
Warning!
Never use ->isEmpty on a value type. The value will be converted to a list (with the value as its only item) and that will always evaluate as False.
See also: OCLOperators notEmpty