OCLOperators isEmpty
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=== isEmpty () : Boolean ===
=== isEmpty () : Boolean ===
Returns true if ''self'' is empty, false otherwise.
Returns true if ''self'' is empty - otherwise, returns false.
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[[Category:OCLOperators]]
 
===== 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]]
[[Category:OCL Collection Operators]]
{{Edited|July|12|2024}}

Latest revision as of 15:42, 10 February 2024

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

This page was edited 89 days ago on 02/10/2024. What links here
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