Here is a somewhat simplified example:
Lets say you decide to model positions as {:x 12 :y 10} {:x 23 :y 34}
...And then you want to describe what is present at each of these positions
Then this can simply be done using a map
{ {:x 12 :y 10} "A house",
{:x 23 :y 34} "Other house"}
This may not sound useful but once you wrap you head around it, situations
where this simplifies things pop up often enough.
/PJC
On Wednesday, August 7, 2013 6:28:00 PM UTC+2, Abraham wrote:
>
> this is in reference to the followng article
>
>
>
>
> http://blog.safaribooksonline.com/2013/08/06/two-simple-clojure-tricks-with-values/
>
> wherin it says any value ( function , vector , other data structure of
> clj) can be used as key for a hashed map.
>
> can anybody enlighten how is it useful if function or any other data
> struc. is used as key?
>
> Thnks
> A
>
>
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