[REBOL] Re: Newbie question...
From: gjones05:mail:orion at: 5-May-2001 5:36
From: "Libertysurf"
<snip>
> My script tries to let the user choose a list of words
> and to make these words appear in a random order,
> at request. I tested the script whith a single block and it worked.
>
> But now, why do I get "none" at each request ? Could anybody
> give me some help ?
<snip>
>
> random/seed now
> menulistes: []
> liste_d: copy/deep [
> "Moi et famille" [main genou pied tête nez cheveux orteil oreille bras
> pouce jambe oeil]
> "Objets" [chaise fenêtre baignoire fourchette lait table four canapé
> porte lit réfrigérateur]
> "Objets personnels" [camion bol cuillère chaussures pyjama "brosse à
> dents" oreiller balle nounours accordéon]
> "Aliments" [jus pain orange pâtes gâteau fraise viande raisin pomme
> carotte banane fromage purée]
> "Animaux" [poule cochon cheval souris lion hyppopotame serpent oiseau
> dauphin phoque baleine]
> ]
>
> liste_d: to-block liste_d
>
> choix: first liste_d
>
> forskip liste_d 2 [append menulistes to-string first liste_d]
> menulistes: sort menulistes
>
> lecture: func [bl] [to-string pick bb: to-block pick bl 6 random length?
> bb]
>
> view center-face lay: layout [
>
> backdrop effect compose [gradient 1x1 (sky) (water)]
> across
> t: text red ivory 900x300 center font-size 130 ""
> return
> r: field wrap ivory 900x250 center font-size 100 font-color blue ""
> return
>
> button 680x100 effect [gradient 200.0.0 0.200.0] font-size 25 "Suivant"
> [t/text: lecture liste_d show t]
>
> text-list 200x100 data menulistes [ t/text: lecture liste_d show t ]
> ;choix: face/picked
> return
> ]
>
> Ronald Gruss
Hello, Ronald,
The simple answer most is that 'forskip causes 'liste_d to point to the tail
of the
block. This word has to be reset to point to the head. This behavior is
also true
for 'forall. However, 'foreach does not have this behavior.
As a side note, when liste_d is first defined, copy/deep is not required,
since
the word points to that literal block.
Here is a revised listing with comments that point to the areas mentioned
above:
random/seed now
menulistes: []
;;;; copy/deep not really needed here
liste_d: copy/deep [
Moi et famille
[main genou pied tête nez cheveux orteil oreille bras pouce
jambe oeil]
Objets
[chaise fenêtre baignoire fourchette lait table four canapé porte
lit réfrigérateur]
Objets personnels
[camion bol cuillère chaussures pyjama "brosse à dents"
oreiller balle nounours accordéon]
Aliments
[jus pain orange pâtes gâteau fraise viande raisin pomme carotte
banane fromage purée]
Animaux
[poule cochon cheval souris lion hyppopotame serpent oiseau
dauphin phoque baleine]
]
liste_d: to-block liste_d
choix: first liste_d
forskip liste_d 2 [append menulistes to-string first liste_d]
;;;; forskip causes liste_d to point to tail of block - needs to be reset to
head
liste_d: head liste_d
menulistes: sort menulistes
lecture: func [bl] [to-string pick bb: to-block pick bl 6 random length? bb]
view center-face lay: layout [
backdrop effect compose [gradient 1x1 (sky) (water)]
across
t: text red ivory 900x300 center font-size 130 ""
return
r: field wrap ivory 900x250 center font-size 100 font-color blue ""
return
button 680x100 effect [gradient 200.0.0 0.200.0] font-size 25 "Suivant"
[t/text: lecture liste_d show t]
text-list 200x100 data menulistes [t/text: lecture liste_d show t]
;choix: face/picked
return
]
Hope this helps.
--Scott Jones
