如何将字符串拆分为五个一组？ [英] How to Split a string into groups of five?

问题描述

我有这个字符串：

I have this string:

string="101,102,103,105,201,250,2564,245564,212,2415,2102,5645,656";

我想把它分成5组。



输出应该是：

I want to split it into groups of 5.

Output should be:

array[0]=101,102,103,105,201
     [1]=250,2564,245564,212,2415
     [2]=2102,5645,656

推荐答案

请看我对这个问题的评论：你没有真正定义wh在你想要实现。



问题太简单了。您只需要两件事情1）正确定义您的要求，2）： http：/ /msdn.microsoft.com/en-us/library/system.string.split.aspx [ ^ ]。



可能你的意思是你想要分割项目由'，'分隔的5个元素组，并将剩余元素（小于或等于5）放在最后一个组中。如果是这样，你还需要知道这个：

http：// msdn。 microsoft.com/en-us/library/3b1ff23f.aspx [ ^ ]，

http：// msdn.microsoft.com/en-us/library/0w4e0fzs.aspx [ ^ ]。 :-)

-SA

Please see my comment to the question: you did not really define what you want to achieve.

The problem is way too simple. You need just two things 1) correct definition of your requirements, 2) this: http://msdn.microsoft.com/en-us/library/system.string.split.aspx[^].

Probably you mean that you want to split the items by groups of 5 elements delimited by ',' and put the remaining elements (less or equal than 5) in a last group. If so, you also need to know this:
http://msdn.microsoft.com/en-us/library/3b1ff23f.aspx[^],
http://msdn.microsoft.com/en-us/library/0w4e0fzs.aspx[^]. :-)

—SA

从脑到纸：

From Brain-To-Paper:

string pattern = @"(?:^|,)(\d+(?:,\d+){1,4})";
var array = Regex.Matches(input, pattern)
                 .Cast<Match>()
                 .Select(m=>m.Groups[1].Value)
                 .ToArray();

假设字符串形成良好的工作。



我已经测试了上面的代码并且它有效（所以，没有了从脑到 - 纸）。下面的代码是废话，但是 - 抱歉错误的提示:-（

或者

This should work assuming the string is well formed.

I've tested the above code and it works (so, no any more "from-brain-to-paper"). The code below is crap, though - sorry for the wrong hint :-(
Alternatively

IEnumerable<string> GetChunks(string input)
{
    var elements = input.Split(new char[]{','});
    foreach(var chunk in elements.Take(5))
    {
        yield return string.Join(",", chunk);  
    }
}
var array = GetChunks(input).ToArray();

[/ EDIT]



干杯

Andi

[/EDIT]

Cheers
Andi

string str ="101,102,103,105,201,250,2564,245564,212,2415,2102,5645,656,444,555";
            string[] arl = str.Split(',');
            if (arl.Length > 5)
            {
                string[] strResult;
                int totCount = arl.Length / 5;
                int totReminder = arl.Length % 5;

                if (totReminder > 0)
                {
                    strResult = new string[totCount + 1];
                }
                else
                {
                    strResult = new string[totCount];
                }

                for (int i = 0; i < totCount; i++)
                {
                    strResult[i] = arl[i].ToString() + "," + arl[i + 1].ToString() + "," + arl[i + 2].ToString() + "," + arl[i + 3].ToString() + "," + arl[i + 4].ToString();
                }
                if (totReminder > 0)
                {
                    for (int i = 5 * totCount; i < arl.Count(); i++)
                    {
                        strResult[strResult.Length - 1] = strResult[strResult.Length - 1] + arl[i];
                        if (i < (arl.Count() - 1))
                        {
                            strResult[strResult.Length - 1] = strResult[strResult.Length - 1] + ",";
                        }
                    }
                }
            }
            else
            {
            //do the needFull
            }

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