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welcome back to another video in this series on design patterns for object oriented languages in this video we are going to talk about the state pattern so the state pattern is a way of managing state or rather the state pattern is a way of building a state machine in a sort of object-oriented fashion and if youre not familiar with state machine state machines are actually a well studied concept in computer science that is heavily studied theoretically and in some sense you could say that many of the state machines are memory less machines in other words machines that make decisions on the basis of where they are currently or in what state they are currently and not based on how they got there and thats how we will use the state pattern we will use the state pattern to say that you have some object that will behave differently depending on what state it is it doesnt matter how it got into that state but depending on what state it is it will do a bunch of different things so were no