I just cannot get my head around the concept of continuations. Please someone put it in an easy way or point me to somewhere this is done.
What I understand:
Its a programming style to help with situations such as checkouts in web apps i.e. long series of steps including address entry, payment details etc. ending in conformation.
When not using continuations, using the back button can disrupt the flow cause "crash" - its hard to maintain state in such a situation (HTTP is stateless).
So continuation makes more statefull, maybe stores previous, current and future actions so that undo is easier? Like making another copy of a string when a change is made to it, so you can undo to the previous stored string?