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Text searching ??

Posted on 2002-07-05
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Last Modified: 2010-04-04
Hi.

I have a listbox with some items in.
I need to create a procedure that will check all the words in the listbox, for mitiply instances.


Example: (listbox items)

Hello Everyone in here
yeah hello
This is a test

so the procedure start by extracting all words in the first sentence "Hello" then it moves though the listbox to see if it do exists other places. If the given word exist in a line i would just like it to show a message :)

Okay hope u get me.
Thanks
 Dennis
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Question by:Dennis9
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  • +5
14 Comments
 
LVL 7

Expert Comment

by:Cynna
ID: 7131711
Well, I'm not quite sure if this is what you want...

Place Button1 and ListBox1 on the Form1:

Copy/Paste:
----------------

procedure TForm1.Button1Click(Sender: TObject);
var i: Integer;
    What, Line: String;
begin
  // What do you want to find:
  What:='hello';
  // Case insensitive search:
  What:=LowerCase(What);
  for i:=0 to ListBox1.Items.Count-1 do begin
      Line:=LowerCase(ListBox1.Items.Strings[i]);
      if Pos(What, Line)>0 then ShowMessage(What+' found in line #'+IntToStr(i));
  end;
end;
0
 
LVL 1

Expert Comment

by:herr_apfelschnitt
ID: 7131725
You want to see if a word is somewhere in a listbox?

function SearchListBox(textToSearchFor: string): Boolean;
var
I: Integer;
begin
Result := false;
for I := 0 to yourListBox.Items.Count - 1 do
begin
    if Pos(textToSearchFor, yourListBox.Items[I]) <> 0 then
       begin
         Result := true; // textToSearchFor found in item I
         // Put some more code here if you want
         break; // If the word is found, exit the for-loop. If you want to continue searching after the first occurence is found, remove this.
       end;  
end;
end;

This function returns true if the text/word was found, and false if not.
0
 
LVL 1

Expert Comment

by:herr_apfelschnitt
ID: 7131728
woops! U were first, Cynna :) I guess I have to work on my typing skills.
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LVL 7

Expert Comment

by:Cynna
ID: 7131734
:))
0
 
LVL 1

Author Comment

by:Dennis9
ID: 7131737
The text to search for is the listboxs own words. It should extract every word between " " (space) and try a search and see if it exists other places in the list
0
 
LVL 1

Author Comment

by:Dennis9
ID: 7131740
The text to search for is the listboxs own words. It should extract every word between " " (space) and try a search and see if it exists other places in the list
0
 
LVL 7

Expert Comment

by:Cynna
ID: 7131764
Sorry, I still don't understand exactly what you need...

Do you want to extract every word of every line, and then search for duplicates?

Please try to be more elaborate.
0
 
LVL 1

Author Comment

by:Dennis9
ID: 7131800
yup Cynna exactly, and if more than 2 dupes are found just show a message
0
 
LVL 6

Expert Comment

by:DrDelphi
ID: 7131854
Try this, much easier:


var list:AnsiString;
begin
   List:=Listbox1.items.Commatext;
   while pos('hello',List)>0 do Delete(List,pos('hello',List),5);
   Listbox1.Items.commatext:=List;
end;



Good luck!!
0
 

Accepted Solution

by:
david-johnstone earned 100 total points
ID: 7131879
OK, try this!!!

procedure TForm1.Button1Click(Sender: TObject);
var
  Temp, Current, Prev: String;
  slTemp: TStringList;
  i: Integer;
  SentMessage: Boolean;
begin
  Temp := ListBox1.Items.CommaText;
  Temp := StringReplace(Temp, ' ', ',', [rfReplaceAll]);
  Temp := StringReplace(Temp, '"', '', [rfReplaceAll]);

  slTemp := TStringList.Create;
  slTemp.CommaText := Temp;
  slTemp.Sort;

  Prev := '';

  for i := 0 to slTemp.Count - 1 do
  begin
    Current := slTemp.Strings[i];

    if (Uppercase(Current) = Uppercase(Prev)) then
    begin
      if not SentMessage then
      begin
        ShowMessage('Duplicate - ' + Current);
        SentMessage := True;
      end;
    end
    else
      SentMessage := False;

    Prev := Current;
  end;

  slTemp.Free;
end;

This seperates all the items of the list box into comma seperated words.  They are then loaded into another string list and sorted alphabetically.  It is then a case of looping through to find any duplicates.  I've put Uppercase() around the comparison part to make it case insensitive.  If you need a case sensitive comparison, then just remove them...

Hope that helps!

David.
0
 
LVL 1

Author Comment

by:Dennis9
ID: 7131949
david-johnstone -> Thanks just what i needed.

Thanks again everyone.

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LVL 27

Expert Comment

by:kretzschmar
ID: 7132573
in this case,
you should david-johnstone's accept comment as answer
0
 

Expert Comment

by:CleanupPing
ID: 9343101
Dennis9:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1 
EXPERTS:
Post your closing recommendations!  No comment means you don't care.
0
 
LVL 5

Expert Comment

by:Lukasz Lach
ID: 9460205
Dennis9,
No comment has been added lately (18 days), so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area for this question:

RECOMMENDATION: Award points to david-johnstone http:#7131879

Please leave any comments here within 7 days.

-- Please DO NOT accept this comment as an answer ! --

Thanks,

anAKiN
EE Cleanup Volunteer
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