Hi Pierre,
If I understand you correctly, you are attempting to crack open a sequence,
as ~@ would do in a macro. You are probably looking for apply.
For example:
(apply + '(1 2 3))
6
On Wednesday, May 20, 2015 at 6:07:13 PM UTC-6, Pierre Thibault wrote:
>
> No:
>
> (type '())
> clojure.lang.PersistentList$EmptyList
>
> It a list just like it should be.
>
> Le mercredi 20 mai 2015 20:02:22 UTC-4, Colin Yates a écrit :
>>
>> That's OK, I am also confused between '() which is a literal list and #{}
>> which is a literal set :).
>> On 21 May 2015 00:55, "Pierre Thibault" <[email protected]> wrote:
>>
>>> OK,
>>>
>>> I don't know how to write macros yet. I was confused.
>>>
>>> Thank you.
>>>
>>> Le mercredi 20 mai 2015 18:48:03 UTC-4, Colin Yates a écrit :
>>>>
>>>> @ (and deref) are used to dereference constructs which support multiple
>>>> values over time; atoms, futures and promises etc. ~@ is a different thing
>>>> entirely and is used to desplice lists in a macro.
>>>>
>>>> In your example, you aren't in a macro and '() is defining a set, I.e.
>>>> it isn't a temperal construct.
>>>> On 20 May 2015 23:43, "Pierre Thibault" <[email protected]> wrote:
>>>>
>>>>> For example:
>>>>>
>>>>> (def foo '(1 2 3))
>>>>> (+ @foo)
>>>>>
>>>>> Does not work. I am expecting 6.
>>>>>
>>>>> Le mercredi 20 mai 2015 18:37:05 UTC-4, Colin Yates a écrit :
>>>>>>
>>>>>> @my-atom is the same as (deref my-atom), is that what you mean?
>>>>>> On 20 May 2015 23:35, "Pierre Thibault" <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Is possible to use the operator '@' alone? In the Joy Of Clojure
>>>>>>> book it is presented as '~@'. I would like an example.
>>>>>>>
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