I like that mapcat solution a lot. Very nice.
For some reason I can't get the destructuring to work... clearly missing
something there.
But fair point on the flatten - I had a play with it, and I can clearly see
the issue.
Thanks for the extra help.
Mark
On Tue, Sep 10, 2013 at 2:17 PM, Matt Mitchell <goodie...@gmail.com> wrote:
> And also:
>
> (mapcat identity {:in [1 2 3]}) => '(:in [1 2 3])
>
> But yeah, destructuring with *&* then using *apply* is pretty clear too.
>
> - Matt
>
> On Monday, September 9, 2013 10:41:12 PM UTC-4, Leif wrote:
>>
>> Careful - `flatten` recursively flattens sequential things. E.g.
>> (flatten (seq {:in [1 2 3]})) => '(:in 1 2 3), which is probably not what
>> you want.
>>
>> You really want `flatten1`, which doesn't exist in core. A version that
>> works on maps is
>> (apply concat {:in [1 2 3]}) => '(:in [1 2 3]). This appears within
>> Alex's solution.
>>
>> I would personally go with Meikel's solution, though. It seems the
>> nicest.
>>
>> --Leif
>>
>> On Monday, September 9, 2013 7:02:43 PM UTC-4, Mark Mandel wrote:
>>>
>>> The solution I've actually gone with is:
>>>
>>> (apply esd/search es-index mapping-type (-> options seq flatten))
>>>
>>> Seems the most consise and shows the intent of what I'm trying to do
>>> quite well - better than a (relatively) confusing `reduce` statement.
>>>
>>> Again, the help is appreciated.
>>>
>>> Mark
>>>
>>>
>>> On Tue, Sep 10, 2013 at 8:57 AM, Mark Mandel <mark....@gmail.com> wrote:
>>>
>>>> Thanks for the help all, that gave me some things to think about.
>>>>
>>>> Cheers,
>>>>
>>>> Mark
>>>>
>>>>
>>>> On Mon, Sep 9, 2013 at 9:22 PM, Meikel Brandmeyer (kotarak) <
>>>> m...@kotka.de> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Am Montag, 9. September 2013 12:31:30 UTC+2 schrieb Alex Fowler:
>>>>>
>>>>>> I would also add that in case, if you *need* to destructure the
>>>>>> `options` map for some reason, like:
>>>>>>
>>>>>> `(defn search
>>>>>> "Docstring"
>>>>>> [mapping-type & {:keys [option-1 option-2] :as options}]
>>>>>> (do-smth-with-option-1 ...)
>>>>>> (apply esd/search es-index mapping-type options))`
>>>>>>
>>>>>> then you can use `mapply` to apply maps to functions that accept
>>>>>> optional args maps. The code of mapply is the fllowing:
>>>>>>
>>>>>> `(defn mapply [f & args] (apply f (apply concat (butlast args) (last
>>>>>> args))))`
>>>>>>
>>>>>> Combining it with partial, as adviced, could give you the
>>>>>> functionality you may sometimes need:
>>>>>>
>>>>>> `(mapply (partial es/search es-index) your-options-map)`
>>>>>>
>>>>>>
>>>>> You don't have to destructure in the argument list:
>>>>>
>>>>> (defn search
>>>>> [mapping-type & options]
>>>>> (let [{:keys [option-1]} options
>>>>> index (index-based-on option-1)]
>>>>> (apply esd/search index mapping-type options)))
>>>>>
>>>>> Kind regards
>>>>> Meikel
>>>>>
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