Another solution, repeats itself slightly less:
(assoc obj
:key (or (:key obj)
(something-else-with-side-effects-maybe?)))
Not sure I like it much better than the first one. But I usually prefer not
writing my own macros/functions when I can avoid it, so it has that plus.
On Sat, May 25, 2013 at 8:50 AM, Jim - FooBar(); <jimpil1...@gmail.com>wrote:
> I just realised you can also do this to get the same effect of
> pred-transform...This is the first time I'm using cond->! I'm starting to
> realise its usefuleness... :)
>
> (let [rpred (complement pred)]
> (cond-> obj
> (pred obj) identity ;;if true return it untouched
> (rpred obj) tf)) ;;if false do the transformation
>
> Jim
>
>
> On 25/05/13 14:29, atkaaz wrote:
>
> 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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