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...compare two Strings and measure the percentage they match?
Autor: Uwe
Homepage: http://www.lmc-mediaagentur.de/dpool.htm
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Tip Rating (8):  
     


uses
  
Math;

function DoStringMatch(s1, s2: string): Double;
var
  
i, iMin, iMax, iSameCount: Integer;
begin
  
iMax := Max(Length(s1), Length(s2));
  iMin := Min(Length(s1), Length(s2));
  iSameCount := -1;
  for i := 0 to iMax do
  begin
    if 
i > iMin then
      
break;
    if s1[i] = s2[i] then
      
Inc(iSameCount)
    else
      
break;
  end;
  if iSameCount > 0 then
    
Result := (iSameCount / iMax) * 100
  else
    
Result := 0.00;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  
match: Double;
begin
  
match := DoStringMatch('SwissDelphiCenter', 'SwissDelphiCenter.ch');
  ShowMessage(FloatToStr(match) + ' % match.');
  // Resultat: 85%
  // Result  : 85%
end;

 

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