Intro Be any machine, a processor is always a limited hardware resource, to provide seamless experience to users its important to execute all tasks in such a fashion that it serves the right need at the right time. Hence multithreading, queues and their execution pipelines. …

DispatchGroup When running multiple tasks on a group of threads asynchronously and wanting to perform another operation only when all of those threads gets completed, DispatchGroup would save our day. If unaware of what GCD is ?, Please read https://medium.com/@simon223397/gcd-in-swift-8133e7908ae Problem : Download multiple images from multiple URL’s asynchronously from 1 loop, but update view only after downloading of all of them is completed.

Calling function does not know what type its going to receive from a function, hence the function that returns an unknown type, is of Opaque type function. On the other hand, Calling function decides the type it would want to send as a parameter to another function, this another function…

Structs, Enums, Tuples and all built-in data types like Int/String are Value types. Classes and Actors are of references types. — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —…

You need 6 main parts : Controller, View, Interactor, Presenter, Router and Model Following is an Instances creations and respective delegates assigning point. Can be done where ever new rootcontroller is initialised.

You need 4 parts : Controller, Model, View and Presenter. Following is a Controller, has a delegate reference in presenter and a delegate reference in view.

You need 4 parts : Controller, Model, View and View-Model. Following is a Controller, has a binding reference in view-model and a delegate reference in view.