Devoxx - filter, partition and offset
wclark1324 at comcast.net
Wed Apr 3 19:37:27 PDT 2013
Add to that Python:
and the JDK itself uses filter in the same sense for a few types:
The JDK is explicit in at least one case I can think of:
Collection.retainAll and .removeAll. Maybe someone else can think of an
example where the JDK uses filter in the less common sense? (the
left-handed analogy was quite apt.)
On 4/3/2013 5:50 PM, Jed Wesley-Smith wrote:
> On 3 April 2013 22:36, Stephen Colebourne <scolebourne at joda.org> wrote:
>> It didn't come up in the Devoxx lab, but I found the filter() method
>> confusing when reading code in the talks. It was not obvious to me
>> whether it was filtering in or out.
>> I was then surprised that there was only one method in the API for
>> filtering, rather than two - one to remove and one to retain. While
>> clearly they are a logical not, in code readbility terms its typically
>> a lot clearer.
>> Perhaps keep() and reject()? I'm sure there are other names, but
>> filter alone feels very unclear. (I can't remember which it is now).
> Standard ML:
> all define the same behaviour and name of this method.
> It is sufficiently commonplace that to define it differently would be
> arbitrary and random.
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