将一组数字转换为String [英] Convert the numbers of a set to String

问题描述

我想将数字从 MySet =集1..8 保存到 MyString：String 。是否有像 IntToStr 这样的函数可以做到这一点？

I would like to save the numbers from MySet = set of 1..8 to MyString : String. Is there a function like IntToStr which can do this?

我有一个调度程序，它在其中接收一个字符串（* * * * * * * *）的形式。星号之一代表执行的天数，而 MySet 是执行天数的列表。例如1是星期一，2是星期二。我必须将数字从集合保存到该字符串，所以它看起来像这样：（0 0 15 * * * 1,2,3 *）。这意味着，调度程序将在每个星期一，星期二，星期三的15:00触发。

I have a scheduler, which takes in a string in the form of (* * * * * * * *) . One of the stars represents the days of execution, and MySet is the list of days. For example 1 is monday, 2 is tuesday. I have to save the numbers from the set to that string, so it would look something like this: (0 0 15 * * * 1,2,3 *) . This means, that the scheduler will trigger every Monday, Tuesday, Wednesday at 15:00.

如果您想了解更多有关此格式的信息： http://www.nncron.ru/help/ZH/working/ cron-format.htm

推荐答案

使用 for..in 迭代器以生成所需的字符串：

Use the for..in iterator to produce the wanted string:

Type
  MySet = set of 1..8;

function MySetToString(const s: MySet): String;
var
  i: Integer;
begin
  Result := '';
  for i in s do begin
    Result := Result + IntToStr(i) + ',';
  end;
  SetLength(Result,Length(Result)-1);
end;

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