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 <javascript:>>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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