So I guess that the possibility of using This as a formal parameter is a
goodie associated with dynamic scoping, which I am not (yet) really used to
..
It opens a few doors. Nice!
Op zo 10 jun. 2018 18:20 schreef Arie van Wingerden :
> Hi Alex,
>
>
> > I would do it this way:
> >
> >(se
???
I can do:
: (get (car Employees) 'category)
-> engineer
: (show (car Employees))
emp1 NIL
category engineer
name "Abel"
-> emp1
which just works fine for me!
2018-06-10 17:43 GMT+02:00 Johann-Tobias Schäg :
>
> : (put emp1 'category 'engineer)
> -> engineer
> : (setq Employees '(emp
Pls see previous reply.
I don't see the need for eval here ...
2018-06-10 18:05 GMT+02:00 Johann-Tobias Schäg :
> The solution to the puzzle:
> (get (eval (car Employees)) 'category)
> -> engineer
>
> Your list contain named symbols called emp1, ... , emp5
> You associate the properties with emp1
Hi Johann,
you are right!
In my reply to Alex I explicitly tell about that :)
Thx,
Arie
2018-06-10 17:31 GMT+02:00 Johann-Tobias Schäg :
> You are right. But that does not change the fact that your code will
> misbehave if you do not define a name.
> 2. You did not mentioned mention how it d
Hi again,
well, the master himself created the original example, so ...
Also, I assume that this comparisopn might be a little bit faster, because
more specific?
Thx,
Arie
2018-06-10 17:33 GMT+02:00 Johann-Tobias Schäg :
> Also while pointer equality '== might be fine in this case '= makes m
Hi Alex,
> I would do it this way:
>
>(setq Employees '(emp1 emp2 emp3 emp4 emp5))
OK. You don't use the values as names, but the properties, because you'd
like to refer to (: name) in the 'prinl'.
Got it.
>(mapc put
> Employees
> '(name .)
> '("Abel" "Jones" "Milln
The solution to the puzzle:(get (eval (car Employees)) 'category)-> engineerYour list contain named symbols called emp1, ... , emp5You associate the properties with emp1 in the global binding.But find looks for a symbol which contains the attribute 'category. But none of the symbols in the list d
: (put emp1 'category 'engineer)-> engineer: (setq Employees '(emp1 emp2 emp3 emp4 emp5))-> (emp1 emp2 emp3 emp4 emp5): (get emp1 'category)-> engineer: (car Empl
Also while pointer equality '== might be fine in this case '= makes more sense to me
You are right. But that does not change the fact that your code will misbehave if you do not define a name.2. You did not mentioned mention how it does misbehavior so i assumed.
Hi Johann,
I think that is not correct.
In the first place I think I don't need a name property. Only the 'category!
In the second place: (get 'name emp1) will ALWAYS return NIL, because the
function call is incorrect.
It should be: (get emp1 'name)
In my examples this works ok:
: (put emp1 'ca
On Sun, Jun 10, 2018 at 02:13:10PM +0200, Arie van Wingerden wrote:
> Please give a complete example!
I would do it this way:
(setq Employees '(emp1 emp2 emp3 emp4 emp5))
(mapc put
Employees
'(name .)
'("Abel" "Jones" "Millner" "Noles" "Zaphod") )
(mapc put
Empl
The first problem is that all your employees have no 'name property. ( get 'name emp1) -> NILBut emp1 -> "Abel"But there is something else rotten. I can not spot. But try to get (with 'emp1 (prinl (: name))) running firstRegarding your 'This question: https://software-lab.de/doc/refT.html#This
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 fe
Hi,
I'll have a look first and will let know!
Thx,
Arie
2018-06-10 7:15 GMT+02:00 Alexander Burger :
> On Sun, Jun 10, 2018 at 07:04:44AM +0200, Alexander Burger wrote:
> > In the DB GUI of the wiki (you get there after logging in, and going to
> "My
> > account"), there is a menu entry "Upl
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