On Jun 16, 2:59 am, Colin Yates <colin.ya...@gmail.com> wrote:
> Thanks for all the help, all of you.  The Clojure community has a reputation
> for being helpful :)
>
> The example of age as a property which might change from a value to a
> function was indeed a strawman, but it was just an example.  So the
> consensus seems to be that yes, that requirement is hard to solve, but as
> Sean states, it isn't a particularly common occurrence.  KISS with maps
> seems to be the way to go.
>
> Thanks again!

FWIW, in Common Lisp the two main record-like types of objects
(structs and classes) are defined using macros that have the option of
generating accessor functions for you. Also typically when using raw
lists as data structures it is considered good practice to define
functions that abstract the access to their elements.
If defining functions manually for your maps is tedious, consider
coding a macro that does it for you. Note that, unlike accessor
methods in OO classes, accessor functions for maps/lists cannot be
polymorphic in the type of the data structures they access, so they
typically end up encoding the name of the data structure in their own
name, e.g person-age.

Cheers,
Alessio

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