Maybe you can do something with this.
It's an implemenataion of the Damerau-Levenshtein distance.
The output is equal to the minimal number of insertions, deletions,
substitutions and transpositions needed to transform one string into the
other.
Could be handy for a spellchecker...
It's not optimized, just wrote it a few days ago for testing...
private static function compare(first:String, second:String):Number
{
if(first == "" || second == "") return null;
var f:Array = first.split("");
var s:Array = second.split("");
var dist:Array = new Array();
for(var i:Number = f.length+1 ; i--)
{
dist[i] = new Array();
for(var j:Number = s.length+1 ; j--)
{
if(i==0) dist[i][j] = j;
else dist[i][j] = 0;
}
dist[i][0] = i;
}
for(var i:Number = 1 ; i <= f.length ; i++)
{
for(var j:Number = 1 ; j <= s.length ; j++)
{
var cost:Number = ((f[i-1]==s[j-1])?0:1);
var dx:Number = dist[i-1][j]+1;
var dy:Number = dist[i][j-1]+1;
var dz:Number = dist[i-1][j-1] + cost;
dist[i][j] =
Math.min(Math.min(dx,dy),Math.min(dy,dz));
if(i > 1 && j > 1 && f[i] == s[j-1] &&
f[i-1] == s[j])
dist[i][j] =
Math.min(dist[i][j],dist[i-2][j-2]+cost);
}
}
return dist[f.length][s.length];
}
Bernard
> -----Oorspronkelijk bericht-----
> Van: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Namens
> Steven Sacks | BLITZ
> Verzonden: vrijdag 28 juli 2006 0:59
> Aan: Flashcoders mailing list
> Onderwerp: RE: [Flashcoders] String Empowerment
>
> Pseudocode examples of usage:
>
> "hello".capitalize() > "Hello"
> "HELLO".capitalize() > "Hello"
> "123ABC".capitalize() > "123abc"
>
> "hello".center(4) > "hello"
> "hello".center(20, "_") > "_______hello________"
>
> "hello".chomp() > "hello"
> "hello\n".chomp() > "hello"
> "hello \n there".chomp() > "hello \n there"
> "hello".chomp("llo") > "he"
>
> "string\r\n".chop() > "string"
> "string\n\r".chop() > "string\n"
> "string\n".chop() > "string"
> "string".chop() > "strin"
> "x".chop().chop() > ""
>
> a = "hello world"
> a.count("lo") > 5
> a.count("^hello ") > 3
> a.count("ej-m") > 4
> a.count("^e-t") > 3
>
> a = "hello"
> a.ljust(4) > "hello"
> a.ljust(20) > "hello "
>
> a = "hello world"
> a.remove("l") > "heo word"
> a.remove("lo ") > "hewrd"
> a.remove("^aeiou") > "eoo"
> a.remove("ej-m") > "ho word"
> a.remove("^e-t") > "helloorl"
>
> "stressed".reverse() > "desserts"
>
> a = "hello"
> a.rjust(4) > "hello"
> a.rjust(20, "-") > "---------------hello"
>
> "yellow moon".squeeze() > "yelow mon"
> " now is the".squeeze(" ") > " now is the"
> "putters shoot balls".squeeze("m-z") > "puters shot balls"
> "hello world".squeeze("^ ") > "helo world"
>
> " hello ".strip() > "hello"
> "\tgoodbye\r\n".strip() > "goodbye"
>
> "Hello".swapcase > "hELLO"
> "cYbEr_PuNk11".swapcase > "CyBeR_pUnK11"
>
>
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