Documentation:OCLOperators collectNested: Difference between revisions

OCLOperators collectNested

Revision as of 08:26, 27 March 2023

collectNested ( expr : OclExpression ) : Collection(T2)

Returns a collection containing all the elements contained in self on which we applied the OclExpression expr. The results won't be flattened. The type of the resulting collection depends on the type of self.

For the purpose of this example, we'll assume here that we have a Class *Person* with a reference *children*. Our model contains two persons such as *person1.children = {James, Jane}* and *person2.children = {John}*.

Expression	Result
self.persons->collectNested(children.firstname)	Sequence{Sequence{James, Jane}, Sequence{John}}

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			=== collectNested ( expr : OclExpression ) : Collection(T2) ===
	Returns a collection containing all the elements contained in self on which we applied the OclExpression expr. The results won't be flattened. The type of the resulting collection depends on the type of self.		Returns a collection containing all the elements contained in self on which we applied the OclExpression expr. The results won't be flattened. The type of the resulting collection depends on the type of self.