The (fun _ -> postCode) does look a bit funny yeah. It’s just a lambda that ignores its input and always returns the value of the postCode argument that was passed in to the outer function. So it’s just a transformer that doesn’t depend on the current value. This is all setters are, they just overwrite what is currently stored with a completely new value.
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Awesome yeah you’ve got it! 🙌
The
(fun _ -> postCode)does look a bit funny yeah. It’s just a lambda that ignores its input and always returns the value of thepostCodeargument that was passed in to the outer function. So it’s just a transformer that doesn’t depend on the current value. This is all setters are, they just overwrite what is currently stored with a completely new value.