(loop for e in employees when (is-developer e) collect e)
> I'd defy anyone to come up with a dynamically-typed equivalent to this
> Scala snippet that's as simple, comprehensible, and as effortlessly
> thread-safe:
>
> val developers = employees collect { case d: Developer => d }
>
>
>
>
>> On 10/12/11, Josh Berry <[email protected]> wrote:
>> > On Wed, Oct 12, 2011 at 3:01 PM, phil swenson <[email protected]>
>> > wrote:
>> >>
>> >>
>> >>> I'm still puzzled by Dart's allowance of dynamic typing, though.
>> What's
>> >>> the rational here? Saving a few keystrokes just so you can prototype
>> >>> faster?
>> >>> This doesn't make much sense.
>> >>
>> >> this is what I think you don't get: most web devs like dynamic typing.
>> >
>> > I think people just like it when things work as well as they can.
>> > When building a bike, you are likely to try riding it a few times
>> > before it is really "ride-able." With what is commonly called dynamic
>> > typing, you can typically do this. With static typing, if it won't
>> > stand, it won't run. Period.
>> >
>> > In this regard, I admit I would like an optionally static/dynamic
>> > split. Imagine testing a few additions to a visitor/node tree where
>> > you purposefully didn't completely all implementations of the methods
>> > because you just aren't there yet and don't care. (If you have
>> > several visitors, might want to just try one or two at a time, for
>> > example.) This is certainly doable with a lot of upfront planning
>> > regarding modular codebases, but it would be a lot easier if you could
>> > just say "don't enforce this now."
>> >
>> > Obviously, this is all starting with "I think." So, your mileage will
>> > vary. I'm interested in how far off the mark I am, though.
>> >
>> > --
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>> >
>>
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