Why We Do Scala in Zalando
Zalando Engineering
JANUARY 8, 2018
contains ( "@" ) => Invalid ( s "$invalid is not a valid email address" ) case valid => val tagged = tag [ EmailAddressTag ]( valid ); Valid ( tagged ) } } } Function Composition Monads/applicatives One of my favourite features of Scala is how easy and elegant it is to compose functions to create more complex ones.
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