[hvocode]

That’s not that hard in an FP language. I routinely write code with multiple structures referring to the same thing. My usual solution is to have an identifier for the thing that indexes into an array or map, and then the other structures contain that ID instead of the object itself. It’s basically a pointer like I’d use in any other language. The details and choices for how to represent the IDs and structures is usually application specific, but that’s true in any language: how you do something should be the choice that best fits your problem. There isn’t anything about functional programming that makes it impossible or particularly difficult.

[chadcmulligan]

ok, cool, would you know some sample code somewhere you could point me to? Just to see an example, always thought you couldn't do this.