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PaipoJim

Thanks Lutz. I really needed to read the section on the eval function a little more carefully.

PaipoJim

- When using a function to generate symbols for the creation of contexts the following behavior can be observed: > (define (build-sym x) (sym (string 'C x))) (lambda (x) (sym (string 'C x))) > (context (build-sym 2)) C2 C2> (context MAIN) MAIN > (context? (build-sym 2)) nil > (context? (eval (build-...

PaipoJim

I'm a println man myself from way back but I used the debugger today. I was about eight levels deep in a sea of parentheses, they were balanced (though not very well as it turned out), and I couldn't figure why I was getting different runtime errors as I switched things around, until I started watch...

PaipoJim

newdep wrote:The unlambda language:

http://www.madore.org/~david/programs/unlambda/

LOL. "First-class continuations" - I love it!
-

PaipoJim

newdep wrote: Is 'max quicker on a sorted or unsorted list ;-)

Ha ha, very funny! One thing for sure, sort is a really slow way to get the max:

Code: Select all

> (time (sort c))
183

> (last c)
3549

FWIW, I can't really see much difference in max with sorted input:

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> (time ((push max c) (eval c)))
27

-

PaipoJim

...shorter. But not neccesarily faster: > (setq c (flat (dup b 1000))) ....35 51 34 > (time (apply max c)) 49 > (time ((push max c) (eval c))) 23 > (pop c) max <C42C> > (time (apply max c)) 48 I'm wondering if pushing a function onto a list is always faster than mapping apply or is it just a peculi...

PaipoJim

Note about the last NCR:x symbol. Where is it from? I think it must not be present... Or I have a mistake somewhere? The NCR:x is the symbol x in the dolist and was created along with NCR:ctx and NCR:import-ncurses when the function "import-ncurses" was *defined*. The various strings were used to c...

PaipoJim

I also thought to 'do something with sym', and I see your solution points in this direction. But you're using the 'cons' statement, which I never used myself before; Peter, I think I might have left out a few functions in that last example. However here is some working code I wrote yesterday that s...

PaipoJim

Honestly... Concept of this game isn't mine. I played one that has 5x5 field. I couldn't solve it (only by accident), so I decided to make my own version where I can better see the field and can think about it more :-) Later on, I added more levels ;-) Fanda Good for you! I can't solve the 5x5 even...

PaipoJim

So every time when I print the address of an array member, the address changes....?!?! Peter The manual defines "address" to work only with "int", "double flost", and "string". There is some more documentation of memory management in the FAQ at: http://newlisp.org/MemoryManagement.html How about us...

PaipoJim

I am trying to write a function that creates a number of contexts of the same type all with the same default function, a sort of class constructor method, if you will. It seems possible but I can't get it to work (at least without a macro). > (define (myProc) (println "hi")) (lambda () (println "hi"...

PaipoJim

Regarding an implicit 'if': I have been going back and forth on this in my mind, I am just not sure if I want it, if it leads to too much ambiguities from a users point of view? When the first expression evaluates to 'nil' things are clear, but what if the the xpression evauates to a list or number...

PaipoJim

Taken from a debate in the #newlisp channel on freenode, here was this guy's complaints/arguments: <someguy> well, newlisp's memory manager really sucks <someguy> because it doesn't handle shared structure Put them in a context. <someguy> it copies objects when you pass parameters <someguy> because...

PaipoJim

Hi newLispers, With the GTK-server it is possible to create a drawing on a canvas. I made a demonstration here: ... It is always a pleasure to read your well formatted code! However, I much prefer the formatting scheme for parentheses that you used in "fractals.lsp" to the one you employed in "canv...

PaipoJim

Hi newLispers, With the GTK-server it is possible to create a drawing on a canvas. I made a demonstration here: ... It is always a pleasure to read your well formatted code! However, I much prefer the formatting scheme for parentheses that you used in "fractals.lsp" to the one you employed in "canv...

PaipoJim

This inconsistent function name also occurs in the "Design elements and patterns" doc: Chapter 6. Creating accessing and modifying lists section: Passing lists by reference (define (change-data obj i value) (nth-set i obj:data value)) (set 'DB:data '(a b c d e f)) (change DB 3 'x) => d DB:data => (a...

PaipoJim

In section13 - "Dynamic and lexical scoping" of the "newLISP Users Manual and Reference v.8.6.0 rev-1" it states: Note that by passing quoted symbols to a user-defined function, a potential name clash may occur if the same variable name is used as a function parameter: (define (inc-symbol x y) (inc ...

PaipoJim

Thanks Lutz! This latest binary build (8.6.0a-dmg) seems to work like a charm. That Tcl interface is really slick. The only problem I've had is an error when trying to access the Help menu when inside of Wish but I haven't really researched my setup or any documentation yet. Sorry if I sounded a lit...

PaipoJim

So I download newlisp-8.6.0.dmg and the documentation says to run the Mac package installation and follow the instructions. It also states that to run newlisp after the install I should type either "newlisp" or "newlisp-tk" at a Terminal command line. OK. The installer program says that installation...

PaipoJim

Lutz wrote: ...

Code: Select all

(define (change lst idx value) 
    (nth-set idx (eval lst) value))

(change-db 'mydb 1234 "abcdefg") ; quoted 'mydb
...

Lutz[/quote]

Shouldn't that be:  ([color=darkred][b]change[/b][/color] 'mydb 1234 "abcdefg")  ?
.

newlispfanclub.alh.net

Search found 20 matches

Evaluation of context symbols.

Re: Fed up with Lambda ?

Re: unattended symbol

Question about the "def-new" function.

Re: Arguments against newlisp (pro-SBCL)

Re: Create drawings on a canvas

Re: Create drawings on a canvas

variable capture.

OSX installer not functional.