[Haskell-cafe] Java or C to Haskell

Donald Bruce Stewart dons at cse.unsw.edu.au
Wed Sep 20 04:54:04 EDT 2006


dons:
> crespi.albert:
> > 
> > I'm trying to write in Haskell a function that in Java would be something
> > like this:
> > 
> > char find_match (char[] l1, char[] l2, char e){
> > 	//l1 and l2 are not empty
> > 	int i = 0;
> > 	while (l2){
> > 		char aux = l2[i];
> > 		char[n] laux = l2;
> > 		while(laux){
> > 			int j = 0;
> > 			if(laux[j] = aux) laux[j] = e;
> > 				j++;
> > 		}
> > 		if compare (l1, laux) return aux;
> > 		else i++;
> > 	}
> > return '';
> > }
> 
> Yikes!
> 
> > 
> > compare function just compares the two lists and return true if they are
> > equal, or false if they are not.
> > it is really a simple function, but I've been thinking about it a lot of
> > time and I can't get the goal. It works like this:
> > 
> > find_match "4*h&a" "4*5&a" 'h' ----> returns '5' (5 matches with the h)
> > find_match "4*n&s" "4dhnn" "k" ----> returns ''  (no match at all - lists
> > are different anyway)
> 
> That's almost a spec there :)

Ah, I see I misread the spec :) Time for some tea.

-- Don


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