Hi Alex, I am now working on the "Arrays" section at "Find First Element that passes a Test".
Your example: (with (find '((This) (== 'engineer (: category))) Employees ) (prinl "Highest paid engineer is: " (: name)) ) This won't work of course, so I created a few things: : (setq emp1 "Abel" emp2 "Jones" emp3 "Millner" emp4 "Noles" emp5 "Zaphod") -> "Zaphod" : (put emp1 'category 'engineer) -> engineer : (put emp2 'category 'cook) -> cook : (put emp3 'category 'teacher) -> teacher : (put emp4 'category 'engineer) -> engineer : (put emp5 'category 'vicar) -> vicar : (setq Employees '(emp1 emp2 emp3 emp4 emp5)) -> (emp1 emp2 emp3 emp4 emp5) I guessed that this list Employees would be OK to feed 'find'; however, from the ref docs of 'with' I do not grasp how I should get this to work. Also, the function used by 'find' has a formal parameter named This. Is this the PicoLisp special variable, or just a name for a formal parameter? Please give a complete example! What I experience now is exactly why I think that there should be more and better approachable docs. I think the reference should either be expanded by more comprehensive examples + explanations, or otherwise I'll try and do that later in the Wiki where I started the new section (with now only the 'de' example). I feel you, because it is all "in your head", but B2B a.k.a. brain-2-brain is not yet possible, regrettably :) Seeing all this stuff i am convinced that PicoLisp also could have been named YottaLisp, because of the sheer amount of possibilities hidden below the surface :) Best, Arie