Question

我想比较两个String数组之间的值并计算重复的单词我创建了二维数组：第一维：包含所有单词，第二维：包含计数器; 为此，我想将第二维的数据类型从String转换为int 计算重复。我可以做这个转换????

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace change
{
  class Program
{
    static void Main(string[] args)
    {
       // int counter = 1;

        String [] arr =  {"aaa","bbb","ccc","ddd","eee","ddd","bbb"}  ;
        String[] arr2 = { "a", "bb", "ccc", "dd", "aaa", "fff", "ooo" };


        String[,] wordsAndCounter = new string[arr.Length, 2]; // matrix contains [words, counter] . I want to convert counter datatype to int to calculate the repeated words .

        for (int i = 0; i < arr.Length; i++) {
            wordsAndCounter[i, 0] = arr[i];


        //    Console.WriteLine(wordsAndCounter[i,0]);
        //    Console.WriteLine(wordsAndCounter[i, 1]);

            String x= arr[i];
            String y = arr2[i];

        //    for (int j = 0; j < arr.Length; j++) {

                if (x.Equals(y))


              //  {
                    counter++;
                    wordsAndCounter[i, 1] = "counter"; // i want to convert this "counter" to int 
                 //   Console.WriteLine(wordsAndCounter[i, 1]);
                 //   Console.WriteLine(counter);
                }
                else {

                    wordsAndCounter[i, 1] = "counter"; // i want to convert this "counter" to int 
                  //  Console.WriteLine(wordsAndCounter[i, 1]);
                   // Console.WriteLine(counter);
                }

            }

        }
        Console.ReadLine();

    }

} }

Answer 1

要从字符串转换为int，您始终可以使用int.Parse或（甚至更好）int.TryParse。但是在您的示例中，您定义了字符串数组，因此您实际上需要向后转换 - 因此您可以使用ToString()。你的方法的缺点是缺乏灵活性 - 你想要整数，而不是字符串，因此你可以使用dinamic对象或通用字典/元组列表/什么。这是一个带动态对象的简短LINQ解决方案：

String [] arr =  {"aaa","bbb","ccc","ddd","eee","ddd","bbb"}  ;
String[] arr2 = { "a", "bb", "ccc", "dd", "aaa", "fff", "ooo" };

var list = arr.Select(a => new {Word = a, WordCount = arr2.Count(a2 => a2 == a)}).ToList();
list.ForEach(el => Console.WriteLine(el.Word + "  " + el.WordCount));

Answer 2

如果我理解你想要的东西：

static void Main()
{
    int counter = 1;

    String [] arr =  {"aaa","bbb","ccc","ddd","eee","ddd","bbb"}  ;
    String[] arr2 = { "a", "bb", "ccc", "dd", "aaa", "fff", "ooo" };

    Dictionary<string, int> dict = new Dictionary<string, int> ();

    for (int i = 0; i < arr.Length; ++i)
    {
        wordsAndCounter[i, 0] = arr[i];
        string x = arr[i];
        string y = arr2[i];

        if (x.Equals(y)) {
            if (dict.ContainsKey(x)) {
                ++dict[x];
            } else {
                dict[x] = 1;
            }
        }
    }

    foreach (var el in dict) {
        Console.WriteLine("{0} {1}", el.Key, el.Value);
    }
}

我可以将数组中的列数据类型从字符串转换为int吗？

2 个答案: