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 <kfjwhee...@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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