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    Substitute State Using Functions With A State Monad

    We take a closer look at the get construction helper and see how we can use it to lift a function that maps the state portion and updates the resultant with the result. Using get in this fashion, we then demonstrate how we can make accessors that can then be extended to create more complex interactions.

    As there are times that we only want to pull the resultant for a given computation, we take a look at running our instances with the evalWith method. evalWith will run our computations, throwing away the state, returning the resultant.

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