On Sat, Feb 21, 2009 at 5:07 PM, David Nolen <dnolen.li...@gmail.com> wrote:
> dissoc is like assoc.
> If you want to use collections with dissoc you can always use apply. It's
> not too much to type:
> (def my-map {:first "Bob", :middle "Joe", :last "Smith"})
> (apply dissoc my-map [:first :middle])
I think you misunderstood what I want. I want to be able to pass
individual keys to select-keys. I'm not looking for a way to pass
collections of keys to dissoc and assoc.
My guess is that this inconsistency was purely accidental and could be
fixed so select-keys also accepts individual key arguments.
> On Sat, Feb 21, 2009 at 5:58 PM, samppi <rbysam...@gmail.com> wrote:
>>
>> Allowing dissoc and select-keys to accept both keys as arguments and
>> as a collection would be nice, and backwards compatible. In any case,
>> ostensibly it should be consistent; otherwise, it's just an
>> idiosyncrasy in the language that people will have to deal with. I
>> wonder what the reasoning is behind it, or if it was completely
>> arbitrary.
>>
>> On Feb 21, 1:28 pm, Mark Volkmann <r.mark.volkm...@gmail.com> wrote:
>> > (def popsicle-map {:red :cherry, :green :apple, :purple :grape})
>> >
>> > ; Note how the keys passed to dissoc are individual arguments.
>> > (dissoc popsicle-map :green :blue) ; -> {:red :cherry, :purple :grape}
>> >
>> > ; Note how the keys passed to select-keys are in a vector, not
>> > individual arguments.
>> > (select-keys popsicle-map [:red :green :blue]) ; -> {:green :apple,
>> > :red :cherry}
>> >
>> > I wonder why these were implemented differently. Maybe both dissoc and
>> > select-keys should accept both individual key arguments and a sequence
>> > of keys.
--
R. Mark Volkmann
Object Computing, Inc.
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