在Delphi 2007中对多维数组进行排序 [英] Sorting multidimensional array in Delphi 2007

问题描述

我有一个多维数组，类似于下面描述的数组:

I have a multidimensional array similar to the one described below:

Matrix => array(
 [0] => array( [0] => 7, [1] => 'hello' ),
 [1] => array( [0] => 3, [1] => 'there' ),
 [2] => array( [0] => 1, [1] => 'world' ),
)

我要实现的目标是使用Matrix [i] [0]的值对该数组进行排序.什么是最有效的方法?我研究了递归QuickSort函数的可能性，但是由于我是多维数组，所以它相当复杂.快速排序有很多示例，但是没有一个可以处理字符串数组数组"作为输入的问题.

What I'm trying to achieve is to sort this array using the values of Matrix[i][0]. What would be the most efficient way to do this? I looked into the recursive QuickSort function possibility, but it's rather complicated as I'm multidimensional arrays. There are many examples of quicksort, but none of them handle taking an "Array of Array of String" as an input.

请澄清我的文字是否乱码.我对Delphi还是很陌生.

Please ask for clarification if my text seems gibberish. I'm still fairly new to Delphi.

推荐答案

正如罗布(Rob)在其评论中指出的那样，没有办法同时存储整数和字符串的多维数组(不求助于变体).

As Rob pointed out in his comment, there's no way to have an multi-dimensional array that stores both integers and strings (without resorting to variants).

如果它实际上只是一个包含整数/字符串对的数组，则使用Strings和Objects属性将它们存储在TStringList中会容易得多，然后使用CustomSort对Object值:

If it's really just an array containing integer/string pairs, it would be much easier to store them in a TStringList using the Strings and Objects properties, and then use CustomSort to sort on the Object values:

program Project2;

{$APPTYPE CONSOLE}

uses
  SysUtils, Classes;

function MySortProc(List: TStringList; Index1, Index2: Integer): Integer;
begin
  Result := Integer(List.Objects[Index1]) - Integer(List.Objects[Index2]);
end;

var
  SL: TStringList;
  i: Integer;
begin
  SL := TStringList.Create;
  try
    for i := 0 to 10 do
      SL.AddObject(Format('Item %d', [i]),  TObject(Random(i)));
    SL.CustomSort(@MySortProc);
    for i := 0 to SL.Count - 1 do
      WriteLn(Format('%d: %s', [Integer(SL.Objects[i]), SL[i]]));
    ReadLn;
  finally
    SL.Free;
  end;
end.

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