[progress Communities] [progress Openedge Abl] Forum Post: How To Compare Collections?

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tinvis

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I have a business rule based on the equality of two collections. The condition A=B doesn't do the job, for = is in this case an assignment operator. So I tried to implement the condition with two conditions: A->forAll(B->exists(A.nr=B.nr)) and B->forAll(A->exists(B.nr=A.nr)), but nesting quantifiers doen't seem possible, the error message is 'mismatched brackets'. Does anyone know how to solve this? Thanks.

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