Thank you both for your answers
Regards,
Ryan
On Thursday, February 21, 2013 7:43:05 PM UTC+2, Jim foo.bar wrote:
>
> I think Alex is trying to say that a macro is almost never appropriate
> when a first-class function would do...therefore, there is no good reason
> for carrying the complexity of macros all over your code, given that in
> your case they do nothing special (like postponed evaluation) and can be
> replaced by functions.
>
> Jim
>
>
> On 21/02/13 17:11, Ryan wrote:
>
> I got confused a bit with the reason that a macro would not be appropriate
> for this case. Can you please explain again?
>
> Ryan
>
> On Thursday, February 21, 2013 7:05:11 PM UTC+2, Alex Baranosky wrote:
>>
>> A function could be appropriate, but a macro not appropriate, since
>> everything you need here can be done with using macros.
>> On Feb 21, 2013 7:53 AM, "Ryan" <areka...@gmail.com> wrote:
>>
>>> Thanks for your input Alex.
>>>
>>> Do you think a macro would be appropriate if I use this more than once
>>> in my code?
>>>
>>> Ryan
>>>
>>> On Thursday, February 21, 2013 5:41:49 PM UTC+2, Alex Baranosky wrote:
>>>>
>>>> I'd often just write it like this:
>>>>
>>>> (defn create-map []
>>>>> (merge {:foo "a"
>>>>> :bar "b"
>>>>> ... many more keys}
>>>>> (when (some-condition-true)
>>>>> {:extra-key value)))
>>>>
>>>>
>>>> Alex
>>>>
>>>> On Thu, Feb 21, 2013 at 7:27 AM, Ryan <areka...@gmail.com> wrote:
>>>>
>>>>> Thanks Meikel for your reply.
>>>>>
>>>>> It wasn't clear on my example, but I wish to use *merge *inside my
>>>>> create-map function. Do you think I should bind my hash-map to a let
>>>>> variable first and then apply merge, or do you have another proposal?
>>>>> What
>>>>> i mean is this:
>>>>>
>>>>> (defn create-key-value [value]
>>>>>
>>>>> (when (some-condition-true) {:extra-key value))
>>>>>
>>>>>
>>>>> (defn create-map []
>>>>>> (let [my-map {:foo "a" :bar "b"}]
>>>>>> (merge my-map (create-key-value "some-value")))
>>>>>
>>>>>
>>>>> Is the above "clojurish" or is there a better way? For example if
>>>>> the my-map was a big hash-map, and not with just two pairs, wouldn't it
>>>>> be
>>>>> ugly with the above way? or..it's just fine and no better way is possible?
>>>>>
>>>>> Ryan
>>>>>
>>>>> On Thursday, February 21, 2013 5:02:21 PM UTC+2, Meikel Brandmeyer
>>>>> (kotarak) wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> merge works with nil. So (merge (create-map) (create-key-value
>>>>>> "some-value")) should work as you intend with the functions as they are
>>>>>> defined now.
>>>>>>
>>>>>> Kind regards
>>>>>> Meikel
>>>>>>
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