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Message from discussion Functional TDD: A Clash of Cultures
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Dale Wijnand  
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 More options Oct 2 2012, 10:32 am
From: Dale Wijnand <dale.wijn...@gmail.com>
Date: Tue, 2 Oct 2012 16:32:20 +0200
Local: Tues, Oct 2 2012 10:32 am
Subject: Re: [sug-it] Functional TDD: A Clash of Cultures
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2012/10/2 Ivano Pagano <ivano.pag...@gmail.com>

> On Monday, October 1, 2012 9:00:22 PM UTC+2, lorenzo wrote:

>> 1. quando poi prendo tutti i gatti e vado a metterli in una lista e li
>> processo in quanto "Cat" perdo i miei rifinitissimi tipi e sono fregato.
>> Immagino che qualche meccanismo di double/multiple dispatch del linguaggio
>> mi permetta di recuperarli e portarli avanti comunque.

> val cats: List[Cat] = List(tom, rumtumtugger, felix, topcat)
> val smartCats = cats.filter(_.isInstanceOf[FullTummy])

> Putroppo la seconda lista non ha il type parameter giusto, ma puoi sempre
> chiamare  asInstanceOf[FullTummy]

val smartCats = cats.collect { case smartCat: FullTummy => smartCat }

Dale


 
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