kh420
asked on
Counting Strings
Hey,
First of all I apologize for my English. It is not my first language.
I am new with Delphi.
I want to make a program that counts duplicated strings in a ListBox.
My program has a 2 component a button and a List box. If I push the button it must count how many strings or dabble and show it in a messageBox.
can somebody help me plz?
PS: I have tried with Array and For statement, but I didnt succeed.
First of all I apologize for my English. It is not my first language.
I am new with Delphi.
I want to make a program that counts duplicated strings in a ListBox.
My program has a 2 component a button and a List box. If I push the button it must count how many strings or dabble and show it in a messageBox.
can somebody help me plz?
PS: I have tried with Array and For statement, but I didnt succeed.
ooopss... 'Find' should be 'IndexOf'
and
after Label1.Caption
it should be
:=
instead of
=
and
after Label1.Caption
it should be
:=
instead of
=
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my version :-))
unit checkfor_duplicates_u;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
ListBox1: TListBox;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function checkfor_dub_strings(AStri
var
sl : TStringList;
begin
result := 0; //pre-init
sl := TStringList.Create;
try
sl.Sorted := true;
sl.Duplicates := dupIgnore;
sl.Assign(AStringList);
result := AStringList.Count - sl.Count;
finally
sl.Free;
end;
end;
procedure TForm1.Button1Click(Sender
begin
showmessage('There are '+inttostr(checkfor_dub_st
end;
end.
meikl ;-)
unit checkfor_duplicates_u;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
ListBox1: TListBox;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function checkfor_dub_strings(AStri
var
sl : TStringList;
begin
result := 0; //pre-init
sl := TStringList.Create;
try
sl.Sorted := true;
sl.Duplicates := dupIgnore;
sl.Assign(AStringList);
result := AStringList.Count - sl.Count;
finally
sl.Free;
end;
end;
procedure TForm1.Button1Click(Sender
begin
showmessage('There are '+inttostr(checkfor_dub_st
end;
end.
meikl ;-)
[Listbox called 'LB', Label called 'Label1']
procedure CountDoubles;
var
lCount : integer;
lIndex : integer;
lPos : integer;
begin
lCount := 0;
for lIndex := LB.Items.Count - 1 downto 1 do
begin
lPos := LB.Items.Find( LB.Items[lIndex] );
if ( lPos >= 0 ) and ( lPos < lIndex ) then
begin
Inc( lCount );
end;
end;
Label1.Caption = IntToStr(lCount) + ' duplicates';
end;