Immutability, Implementing Undo and Redo

Carrying on from the previous lecture, we now turn our attention to implementing undo and redo. We also refactor a little, removing a side effect and instead opting to use a pure function; immutability is good.

The source code can be found here.

A text version of this screencast is available here. It was published on 30 Sep, 2020.


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