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Alex Rivera
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How do you extract a value from a variable of an unknown constructor? For instance, I would like to negate the value in an Either if was constructed as a Right: let Right x = getValue in Right (negate x) This code successfully binds Right's value (an Int in this case) to x. This works, but what if getValue returns a Left instead? Is there a way to determine the type of a variable in a let expression? Or is there a better way to approach this problem?
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