C function in metaTalk?

[xbury.cs at clearstream.com]

Eric,

>   repeat with  i = 0 to the length of s
>       put character 0 to i of s into remainder

There is no character 0 of...
You have to account that C starts its indexes at 0 and MC does it at 1...

I dont thinks that's the whole solution but it's a start ;))

cheers
Xavier


> -----Original Message-----
> From: eric.allen.engle at justice.com 
> [mailto:eric.allen.engle at justice.com]
> Sent: Thursday, March 13, 2003 14:11
> To: metacard at lists.runrev.com
> Subject: C function in metaTalk?
> 
> 
> I'm trying to translate the following C functions into
> hypertalk.
> If done properly they take as input a string, say ABC
> and then 
> permutate it into
> a
> a b
> a b c
> b 
> b c
> c
> 
> UGLY C***************************************
> void permsWithPrefix(string s, string prefix)
> 
> public static void printPerms(String s)
> {
> permsWithPrefix(s, "");
> }
> 
> public static void permsWithPrefix(String s, string
> prefix)
> {
> if (s.length() < 2)
> {
> System.out.println(prefix + s);
> }
> 
> else
> 
> {
> String remainder;
> for (int i = 0; i < s.length(); ++i)
> {
> remainder = s.substring(0,i) + s.substring(i+1);
> permsWithPrefix(remainder, prefix + s.charAt(i));
> }
> }
> }
> 
> The closest I've gotten turning this into hypertalk is:
> 
> 
> 
> SWEET METATALK:*************
> on permswithprefix s, prefix
>   
>   if the length of s < 2 then put prefix & s & return
> after cd fld 1 
> else
>     
>     repeat with  i = 0 to the length of s
>       put character 0 to i of s into remainder
>       put character i+1 of s after remainder
>       permswithprefix remainder, prefix & character i
> of s
>     end repeat
>   end if
>   
> end permswithprefix
> 
> 
> on printperms s
>   permswithprefix s, ""
> end printperms
> 
> 
> 
> 
> on mouseUp
>   printperms abc
> end mouseUp
> 
> 
> *************
> 
> But it still doesn't work, apparently because the
> substring function in 
> c will deliver 1 character(!) if you say
> "eric".substring(2,3) 
> // -- returns r, if I remember correctly
> 
> Any ideas? I would really like to just translate this
> function.
> 
> Thanks!
> 
> My Home Page with free online legal information
> Page perso avec liens juridiques
> 
> http://www.lexnet.bravepages.com/ind.htm
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