Question

我有这个用于排序字符串的代码：

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此代码按长度排序字符串，如何按长度和字典顺序进行排序？

示例

 class Program
{
    static void Main()
    {

        int x = Convert.ToInt32(Console.ReadLine());
        List<string> sampleList = new List<string>();

        for (int i=0; i<x; i++)
        {
            string word = Console.ReadLine();
            sampleList.Add(word);
        }


        foreach (string s in SortByLength(sampleList))
        {
            Console.Write(s);
        }
        Console.ReadLine();
    }

    static IEnumerable<string> SortByLength(IEnumerable<string> e)
    {
        // Use LINQ to sort the array received and return a copy.
        var sorted = from s in e
                     orderby s.Length descending
                     select s;
        return sorted;
    }
}

在这种情况下工作正常，但是当我有

时

//Input
4
abba
abacaba
bcd
er

//Output
abacabaabbabcder

我的第一个字符串是ebacaba，这是错误的。

Answer 1

修改

默认情况下，非char在词法上小于char，因此，您可以利用它并省略ThenBy但仍会得到相同的结果（Credit转到Matthew Watson）：

string str = "abba ebacaba bcd er abacaba output ebacabaabacabaabbabcder"; string[] strs = str.Split(' ').OrderBy(x => x).ToArray(); //same result, but shorter

<强>原始

使用OrderBy和ThenBy

string str = "abba ebacaba bcd er abacaba output ebacabaabacabaabbabcder"; string[] strs = str.Split(' ').OrderBy(x => x).ThenBy(x => x.Length).ToArray();

你会得到：

abacaba //aba is earlier than abb abba bcd ebacaba ebacabaabacabaabbabcder er

Answer 2

你可以使用thenby：

static IEnumerable<string> SortByLength(IEnumerable<string> e)
{
    // Use LINQ to sort the array received and return a copy.
    var sorted = e.OrderByDescending(s=>s.Length).ThenBy(r=>r);                 
    return sorted;
}

Answer 3

更改你的功能t：

static IEnumerable<string> SortByLength(IEnumerable<string> e)
{
        // Use LINQ to sort the array received and return a copy.
        var sorted = from s in e
                     orderby s.Length descending, s
                     select s;
        return sorted;
    }

将输出：

abacabaabbabcder
abacaba
output
abb
bcd
edr

与new List<string>{"abb", "abacaba", "bcd", "edr", "output", "abacabaabbabcder"}

一起使用时

因为它将由s.Length排序，然后由s（词汇顺序）

排序

按字典顺序排序C＃

3 个答案: