H S Progr questions

H S Progr answers

• Can't change custom class of UIButton to GIDSignInButton
• Async validation with Formik, Yup and React
• Is swift inout parameter a variable or a pointer?
• Is there a way to compare button images in Swift/iOS
• UICollectionView dynamic cell height (Pinterest layout)
• remove border bottom in ion header
• What are the Hot and Cold observables?