Consider how you'd write a function to perform a similar task. A function
can't delay evaluation, but it should work for something like:

(if-else (> 5 2) :else 'no-way :then 'sure)  =>  'sure

If you manage to write a function that can do the above, you're 90% of the
way to writing a macro.

- James


On 22 June 2014 21:28, Ryan Yogan <ryan.yo...@sonian.net> wrote:

> Hi, I am trying to understand macros and I am having trouble with the
> basics, I am working through some koans and I am stuck, an explanation not
> just a solution would be amazing.
>
> I would like to create a macro that can provide the following
>
> (if-else (> 5 2))
> => nil
>
> (if-else (> 5 2) :then 'sure)
> => sure
>
> (if-else (> 5 2) :else 'no-way :then 'sure)
> => sure
>
> (if-else (> 5 2) :else 'no-way :then
>   (println 'this-is-random) 'sure)
> => this is random
> sure
>
> I know this is not efficient and do would make more sense, but I am trying
> to understand a use case for this and how to accomplish this.
>
> Thank you!
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with
> your first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>

-- 
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your 
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Reply via email to