1

我有两个正在使用的字符串列表。一个有关键字列表,另一个有否定关键字列表。我希望能够在列表中搜索并挑选出不包含否定关键字的列表项并输出到第三个关键字列表。我使用的是 AnsiPos 函数,但是如果它们是单词的一部分,它会找到否定关键字,而不是完整的单词。

关于相对简单的方法有什么建议吗?速度不是那么重要,但会很好。

我想要做的例子:

关键字列表:

猫
鲶鱼
鱼棒
狗粮

否定关键字列表:

想要的返回值:

猫
鲶鱼
狗粮

这就是我到目前为止所得到的......这是行不通的。我使用的信息来自:Delphi 中是否有有效的全词搜索功能?

function ExistWordInString(aString: PAnsichar; aSearchString: string;
  aSearchOptions: TStringSearchOptions): Boolean;
var
  Size : Integer;
begin
  Size := StrLen(aString);
  result := SearchBuf(aString, Size, 0, 0, aSearchString, aSearchOptions) <> nil;
end;

procedure TForm2.Button1Click(Sender: TObject);
var
  i, j, index: integer;
  s: string;
  stl: tstringlist;
begin
  stl := TStringList.Create;
  stl.Text := listbox1.Items.Text;
  for I := 0 to stl.Count - 1 do
  begin
    for j := 0 to listbox2.Count - 1 do
    begin
      if not ExistWordInString(PAnsiChar(listbox2.Items.Strings[j]),
        listbox1.Items.Strings[i], [soWholeWord, soDown])
      then
        listbox3.Items.Append(stl.Strings[i]);
    end;
  end;
end;
4

5 回答 5

2

如果空格是您唯一需要担心的单词分隔符,那么您可以使用 AnsiPos 通过在关键字和否定关键字之前和之后添加空格来进行整个单词匹配

AnsiPos(' '+SubStr+' ', ' '+Str+' ')

您需要一个循环来检查否定关键字列表中的每个条目。

于 2010-01-11T02:41:30.450 回答
1

我想我想通了。使用 stringlist.find('fish',index);

我没弄明白。.find 没有用。

-布拉德

于 2010-01-11T01:17:18.947 回答
1

这个示例代码就像一个魅力(使用 Delphi 7):

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
  Button1: TButton;
  ListBox1: TListBox;
  ListBox2: TListBox;
  ListBox3: TListBox;
  procedure Button1Click(Sender: TObject);

  private
     function ExistWordInString(aString, aSearchString:string;aSearchOptions: TStringSearchOptions): Boolean;

  public
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
    i,k: integer;

begin

    for k:= 0 to ListBox2.Count -1 do
        for i:= 0 to ListBox1.Count - 1 do
        begin
            if not ExistWordInString(ListBox1.Items[i], ListBox2.Items[k],[soWholeWord,soDown]) then
                ListBox3.Items.Append(ListBox1.Items[i]);
        end;

end;

function TForm1.ExistWordInString(aString, aSearchString: string; aSearchOptions: TStringSearchOptions): Boolean;
var
  Size : Integer;

begin
        Size:=Length(aString);
        Result := SearchBuf(PChar(aString), Size, 0, 0, aSearchString, aSearchOptions)<>nil;

end;
end.    

这是表格:

object Form1: TForm1
  Left = 1008
  Top = 398
  Width = 411
  Height = 294
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 320
    Top = 8
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object ListBox1: TListBox
    Left = 8
    Top = 8
    Width = 177
    Height = 97
    ItemHeight = 13
    Items.Strings = (
      'Cat '
      'Catfish'
      'Fish Sticks'
      'Dog Food')
    TabOrder = 1
  end
  object ListBox2: TListBox
    Left = 192
    Top = 8
    Width = 121
    Height = 97
    ItemHeight = 13
    Items.Strings = (
      'Fish')
    TabOrder = 2
  end
  object ListBox3: TListBox
    Left = 8
    Top = 112
    Width = 305
    Height = 137
    ItemHeight = 13
    TabOrder = 3
  end
end

希望这可以帮助。

莱因哈德:-)

于 2010-01-11T11:09:13.283 回答
1

如果您对除 A..Z / Unicode 以外的其他字符感兴趣,则可以使用 SearchBuf 函数(请参阅 Pastacool 的答案) 。

如果您有 Unicode Delphi(D2009 或 D2010),那么您必须使用TCharacter.IsLetterOrDigit(aString: string; aIndex: integer): boolean; 来自字符单元。一个简单的例子让你明白:

procedure TForm7.btn1Click(Sender: TObject);
var
  bMatches: boolean;

begin
  with rgx1 do //custom component - disregard it
  begin
    RegEx:=edtTextToFind.Text; //text to find
    Subject:=mmoResult.Text; //text in which to search
    if Match then //aha! found it!
    begin
      bMatches:=True;
      if chkWholeWord.Checked then //be attentive from here!! - I think that's self explaining...
      begin
        if MatchedExpressionOffset>1 then
          bMatches:=not TCharacter.IsLetterOrDigit(Subject, MatchedExpressionOffset-1);
        if bMatches and (MatchedExpressionOffset+MatchedExpressionLength<=Length(Subject)) then
          bMatches:=not TCharacter.IsLetterOrDigit(Subject, MatchedExpressionOffset+MatchedExpressionLength);
      end;
      if bMatches then //select it in the memo
      begin
        mmoResult.SelStart:=MatchedExpressionOffset-1;
        mmoResult.SelLength:=MatchedExpressionLength;
        mmoResult.SetFocus;
      end
      else
        ShowMessage('Text not found!');
    end
    else
      ShowMessage('Text not found!');
  end;
end;
于 2010-01-11T17:27:04.337 回答
1

将您的功能更改为:

function ExistWordInString(aString:PAnsichar;
   aSearchString:string;
   aSearchOptions: TStringSearchOptions): Boolean;
var 
  b : boolean;
begin
  if soWholeWord in aSearchOptions then
    b := Pos(' '+Uppercase(aSearchString)+' ',' '+UpperCase(aString)+' ') > 0;
  else
    b := Pos(UpperCase(aSearchString),UpperCase(aString)) > 0;
  Result := b;
end;

Pos如果您使用 Delphi 2009/2010 ,请将其从AnsiPos. 我在这里的假设是 soWholeWord 意味着匹配“Fish”将匹配“Fish Sticks”而不是“catfish”。

于 2010-01-11T17:27:15.147 回答