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hey everyone hope youamp;#39;re doing well so today weamp;#39;re going to be continuing on our excited draw app and weamp;#39;re going to be implementing the undo slash redo functionality um if you enjoy this kind of content please consider subscribing and letamp;#39;s get right into it so weamp;#39;re going to start off with looking at a bit of the theory of how undo slash redo functionality generally works thereamp;#39;s two main patterns that we can have a look at if you want to skip directly to the coding iamp;#39;ll leave timestamps in the description um but yeah weamp;#39;ll start off with the theory here so to explain these patterns letamp;#39;s just have a quick look at the uh how the app works just now and then we can go on to the the two so if you imagine this is our current canvas and we have two elements what the state looks like is this object up here which is an array with two elements two objects representing the elements so how we got there is if you imagine we
