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unit Unit1;
interface
uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;
type TForm1 = class(TForm) Button1: TButton; Button2: TButton; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); end;
var Form1: TForm1;
implementation
{$R *.dfm}
uses Generics.Collections; {引用泛型单元}
{从字符串数组中查找}procedure TForm1.Button1Click(Sender: TObject);var arr: array of string; num: Integer;begin {构建动态数组} SetLength(arr, 5); arr[0] := 'aaa'; arr[1] := 'bbb'; arr[2] := 'ccc'; arr[3] := 'ddd'; arr[4] := 'eee';
{查找} TArray.BinarySearch<string>(arr, 'ddd', num);
{显示查找结果} if num < Length(arr) then {如果 num = Length(arr) 就是没找到} ShowMessage(IntToStr(num)); {3}end;
{从整数数组中查找}procedure TForm1.Button2Click(Sender: TObject);var arr: array of Integer; num: Integer;begin {构建动态数组} SetLength(arr, 5); arr[0] := 11; arr[1] := 22; arr[2] := 33; arr[3] := 44; arr[4] := 55;
{查找} TArray.BinarySearch<Integer>(arr, 44, num);
{显示查找结果} if num < Length(arr) then {如果 num = Length(arr) 就是没找到} ShowMessage(IntToStr(num)); {3}end;
end.
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