Here's my solution to your problem. Let me know if it helps.
```
user> (defn if-attr [-key obj missing]
(if-let [ret (get obj -key)] ret (assoc obj -key missing)))
#'user/if-attr
user> (if-attr :abc {} "missing-value")
{:abc "missing-value"}
user> (if-attr :abc {:abc 123} "missing-value")
123
user>
```
25.05.2013, 22:29, "atkaaz" <atk...@gmail.com>:
> yep that was interesting thanks btw; it was a function that was acting like
> a macro, how odd
>
> On Sat, May 25, 2013 at 4:26 PM, Jim - FooBar(); <jimpil1...@gmail.com>
> wrote:
>>> so maybe a let + gensym would be in order?
>> yes that is what you do to avoid double-evaluation...:) I was making a
>> different point though, the fact that definline produces a first class fn
>> which still expands like a macro.
>>
>> Jim
>>
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