Documentation:OCLOperators notEmpty: Difference between revisions

OCLOperators notEmpty

Revision as of 07:36, 3 March 2023

notEmpty () : Boolean

Returns true if self contains at least one element - otherwise, returns false.

Expression	Result
Sequence{2, 'a'}->notEmpty()	true
Sequence{null}->notEmpty()	true
Sequence{}->notEmpty()	false

Warning!

Never use ->notEmpty on a value type. The value will be converted to a list (with the value as its only item) and that will always evaluate to True.

@@ Line 1: / Line 1: @@
 === notEmpty () : Boolean ===
-Returns true if ''self'' contains at least one element, false otherwise.
+Returns true if ''self'' contains at least one element - otherwise, returns false.
 {| class="wikitable"
 !Expression
@@ Line 16: / Line 16: @@
 ===== Warning! =====
-Never use ->notEmpty on a value type. The value will be converted to a list (with the value as it's only item) and that will always evaluate to True.
+''Never'' use ->notEmpty on a value type. The value will be converted to a list (with the value as its only item) and that will always evaluate to True.
 See also: [[OCLOperators isEmpty]]
 [[Category:OCLOperators]]