And there's the threading macro : #(-> {:foo %})
On 1 April 2013 07:12, Ryan <arekand...@gmail.com> wrote:
> Thanks for your input guys
>
> Ryan
>
>
> On Sunday, March 31, 2013 11:11:08 AM UTC+3, Alex Baranosky wrote:
>>
>> There's also 'for'
>>
>> (defn my-function [foo-id a-keyword a-list]
>> (for [m a-list]
>> {:foo_id foo-id (keyword a-keyword) (:BAR_KEY m)}))
>>
>>
>> On Sun, Mar 31, 2013 at 12:57 AM, JvJ <kfjwh...@gmail.com> wrote:
>>>
>>> ...even cheezier, use do
>>> #(do {:foo %})
>>>
>>>
>>> On Saturday, 30 March 2013 23:58:31 UTC-4, JvJ wrote:
>>>>
>>>> Here's a cheezy hack, use identity.
>>>>
>>>> #(identity {:foo %})
>>>>
>>>> On Thursday, 28 March 2013 17:51:10 UTC-4, Ryan wrote:
>>>>>
>>>>> Thanks for your explanation Jonathan. I am still a bit confused however
>>>>> what is the proper solution here. Should i use an anonymous function
>>>>> instead
>>>>> to do what I want or can it be done with the #() syntax?
>>>>>
>>>>> Hyphens is my preferred way as well, but, those keys represent sql
>>>>> columns which they use underscore so I gotta go with underscores in order
>>>>> code to match them :)
>>>>>
>>>>> Ryan
>>>>>
>>>>> On Thursday, March 28, 2013 11:24:38 PM UTC+2, Jonathan Fischer Friberg
>>>>> wrote:
>>>>>>
>>>>>> It's because the #() syntax always calls the content as a function.
>>>>>>
>>>>>> So #(...) is the same as (fn [] (...)). In your case,
>>>>>> #({:foo_id foo-id (keyword a-keyword) (:BAR_KEY %)})
>>>>>> is the same as:
>>>>>> (fn [%] ({:foo_id foo-id (keyword a-keyword) (:BAR_KEY %)}))
>>>>>> Note the extra () around {}. In other words, your map is called
>>>>>> as a function.
>>>>>>
>>>>>> Maps can normally be called as functions, like this:
>>>>>> ({:hello :world} :hello)
>>>>>> => :world
>>>>>> That's why you get the "Wrong number of args" error
>>>>>> (and not a "a map is not a function" error).
>>>>>> Hope that makes sense.
>>>>>>
>>>>>> Btw, hyphen is normally used instead of underscore
>>>>>> in both variables and keywords. Just a slight style
>>>>>> "issue", but maybe you had your reasons. :)
>>>>>>
>>>>>> Jonathan
>>>>>>
>>>>>>
>>>>>> On Thu, Mar 28, 2013 at 10:16 PM, Ryan <areka...@gmail.com> wrote:
>>>>>>>
>>>>>>> Hello!
>>>>>>>
>>>>>>> I am having a small issue with a hash-map initialization and I am
>>>>>>> failing to understand why. I have the following situation:
>>>>>>>
>>>>>>>> (def a-list '({:BAR_KEY bar-value}, {:BAR_KEY another-value}))
>>>>>>>
>>>>>>>
>>>>>>>> (defn my-function [foo-id a-keyword a-list]
>>>>>>>>
>>>>>>>> (map #({:foo_id foo-id (keyword a-keyword) (:BAR_KEY %)}) a-list))
>>>>>>>
>>>>>>>
>>>>>>> So, by running the above function like this:
>>>>>>>
>>>>>>>> (my-function 5 "my_keyword" a-list)
>>>>>>>
>>>>>>>
>>>>>>> I get the following error:
>>>>>>>
>>>>>>>> clojure.lang.ArityException: Wrong number of args (0) passed to:
>>>>>>>> PersistentArrayMap
>>>>>>>
>>>>>>>
>>>>>>> I am trying to get the following result:
>>>>>>>
>>>>>>> ({:foo_id 5 :my_keyword bar-value}, {:foo_id 5 :my_keyword
>>>>>>> another-value})
>>>>>>>
>>>>>>> Any ideas? I have played around in repl for the last 2 hrs but I
>>>>>>> haven't found the proper way to do this.
>>>>>>>
>>>>>>> Thank you for your time :)
>>>>>>>
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>>>>>>
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>>
>>
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