whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1541)

Database (90)
Files (137)
Forms (107)
Graphic (114)
IDE (21)
Indy (5)
Internet / LAN (130)
IntraWeb (0)
Math (76)
Misc (126)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (266)
VCL (242)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

31 Visitors Online


 
...compare two Strings and measure the percentage they match?
Autor: Uwe
Homepage: http://www.lmc-mediaagentur.de/dpool.htm
[ Print tip ]  

Tip Rating (10):  
     


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;

 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners