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Wildcard Function...

Posted on 2004-08-31
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Last Modified: 2010-04-05
Hello,
I need a wildcard function.

This is what it needs to beable to do.

Wildcard('MyString', '*String') = True
Wildcard('MyString', '*Str*') = True
Wildcard('MyString', 'My*') = True
Wildcard('MyString', 'Str*') = False

Thanks.
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Comment
Question by:GreenNewt
7 Comments
 
LVL 4

Expert Comment

by:tobjectpascal
ID: 11941989
I was always led to believe that this was a fourm for people who got stuck because they could not get their code to work or needed a starting point, not for someone to say i need a function to do "This" or "That" i do believe www.rentacoder.com does that or am i totally mistaken?

Have you attempted to write this routine yourself? after all experts-exchange would imply that you also help others if and when you can.
0
 
LVL 17

Expert Comment

by:Wim ten Brink
ID: 11942067
I believe Delphi 7 has a 'like' function somewhere in the strings unit, which does something similar. Am not using Delphi 7 right now so I'm not sure. I know more in 8 hours, I hope, when I'm back home and behind my computer. :)
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Author Comment

by:GreenNewt
ID: 11942106
Ok, Thanks for reply.
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LVL 20

Accepted Solution

by:
Madshi earned 250 total points
ID: 11942165
http://help.madshi.net/StringCompare.htm#StrMatch

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0
 

Author Comment

by:GreenNewt
ID: 11942197
Thank you, I will take a look. ;)
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Author Comment

by:GreenNewt
ID: 11942328
Thanks Madshi
0
 
LVL 14

Expert Comment

by:Pierre Cornelius
ID: 11942397
unit main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    inpStr: TEdit;
    Label2: TLabel;
    inpFind: TEdit;
    btnCheck: TButton;
    procedure btnCheckClick(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses StrUtils;

function Wildcard(Str, FindStr: string): boolean;
type TFindOption = (foStartsWith, foEndsWith, foContains);
var FindOption: TFindOption;
begin
  //by default i.e. when str starts and ends with * or even when no * are used
  FindOption:= foContains;

  //remove leading and trailing spaces
  Trim(Str);
  Trim(FindStr);

  if FindStr[1] = '*' then FindOption:= foEndsWith;
  if FindStr[Length(FindStr)] = '*' then
    if FindOption <> foEndsWith
      then FindOption:= foStartsWith
      else FindOption:= foContains;

  FindStr:= StringReplace(FindStr,'*','',[rfReplaceAll]);

  case FindOption of
    foStartsWith: result:= (FindStr = LeftStr(Str,Length(FindStr)));
    foEndsWith  : result:= (FindStr = RightStr(Str,Length(FindStr)));
    foContains  : result:= (Pos(FindStr,Str)<> 0);
  end;
end;

procedure TForm1.btnCheckClick(Sender: TObject);
begin
  if WildCard(inpStr.Text, inpFind.Text)
    then ShowMessage('Found')
    else  ShowMessage('Not Found');
end;

end.
~~~~~~~~
DFM File
object Form1: TForm1
  Left = 192
  Top = 114
  Width = 233
  Height = 166
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Label1: TLabel
    Left = 16
    Top = 16
    Width = 27
    Height = 13
    Caption = 'String'
  end
  object Label2: TLabel
    Left = 16
    Top = 48
    Width = 20
    Height = 13
    Caption = 'Find'
  end
  object inpStr: TEdit
    Left = 72
    Top = 16
    Width = 121
    Height = 21
    TabOrder = 0
  end
  object inpFind: TEdit
    Left = 72
    Top = 48
    Width = 121
    Height = 21
    TabOrder = 1
  end
  object btnCheck: TButton
    Left = 72
    Top = 88
    Width = 75
    Height = 25
    Caption = 'Check'
    TabOrder = 2
    OnClick = btnCheckClick
  end
end
0

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