undoabletakes a second argument, the derefable object to apply undo/redo to. Default 0 and 1 argument versions use theapp-db.undo-listandredo-listhave a slightly different schema. They are now lists of pairs where each item in the list represents a change (as before) and the pair corresponds to the derefable and the change's state (what used to occupy the item's location in the list).undoablehas a:beforecase where a non-app-dbis pushed to the stack of changes. This is because calling for example(reset! external-db {:test 3})occurs before the :after case. So, to capture the initial state,store-now!must be called before the body of the event transpires. Perhaps areg-fxmay be in order, but I didn't know how to write one that would do the job more elegantly.- Tests in the style as before were added. They use an event which modifies an artificial db object (a local
ratom) - Make everything public. No private defs.
- Migrate to shadow-cljs and lein-shadow
Initial code drop