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oh and welcome to the part number eighteen of the note editor tutorial series my name is Paula crop lot from when free calm and we are currently starting to implement undo and redo operations inside of our note editor so in this part first we are going to explain whatamp;#39;s going on actually with undo and redo with a history stack and stuff and later we are going to implement them so letamp;#39;s start ok so implementation of the undo and redo operations will be quite simple enough for us because we already got our C rotation of the whole scene done so basically what we are going to do is create something like history stack which in our case in peyten itamp;#39;s going to be a list and letamp;#39;s say we are going to say that the maximum number of the items in the history is going to be 8 so the maximum is going to be 8 and we can recall this item something like history times or I donamp;#39;t know doesnamp;#39;t actually matter but itamp;#39;s going to be also we ar
