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Reply to Question about Property Observer
First, I'm sorry for not expressing my question clearly. I'd like to ask if I can implement property observer on "oppositePos" computed property to monitor change of opposite point according to change of original coordinatePoint. However, on my second thought, I realized I couldn't implement it on the property and I didn't need to do it. anyway, I got my answer for the question thanks to your advice. again, thanks for your advice . c00012
Jul ’23
Reply to Question about protocol
I solved this question myself. I should completely implement protocol function in the class not to cause such an error like this: class A: feature {     func getPayment(o: Offer) {         <#code#>     }     func Amortize(o: Offer) {         <#code#>     }     func Export() {         <#code#>     } }
Oct ’22