Question

Image Here我正在尝试执行此程序，当我在输入字段中输入一个字母时，输出文本显示输入文本字母后面的字母，如a应为b，或b应为c，等等。所以我想我可以为字母表创建一个字符串数组，如果输入字母等于循环数组的索引，那么结果将等于索引+ 1.我尝试了它，它只是给了我相同的作为输入的东西。我错过了什么吗？

export {}

declare global {

  interface PromiseConstructor {
    /**
     * A reference to the prototype.
     */
    readonly prototype: Promise<any>;

    /**
     * Creates a new Promise.
     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
     * a resolve callback used resolve the promise with a value or the result of another promise,
     * and a reject callback used to reject the promise with a provided reason or error.
     */
    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason: Error) => void) => void): Promise<T>;

  }
}

Answer 1

我建议使用 Dictionary ，而不是数组。首先创建它：

 using System.Linq;

 ...

 // {{'a', 'b'},
 //  {'b', 'c'},
 //   ...
 //  {'y', 'z'},
 //  {'z', 'a'}}
 const int range = 'z' - 'a' + 1;

 static Dictionary<char, char> s_Dict = Enumerable
   .Range('a', range) // all letters enumerated
   .Select(item => new {
      key = (char) item,
      value = (char) ('a' + (item - 'a' + 1) % range),  
    }) 
   .ToDictionary(item => item.key,
                 item => item.value);

然后使用它

  public static string Encrypt(string source) {
    if (null == source)
      return null; // or throw ArgumentNullException  

    // out var - C# 7.0 syntax
    return string.Concat(source
      .Select(c => s_Dict.TryGetValue(c, out var cNew) // do we have a key?
         ? cNew // if true, put the corresponding value 
         : c)); // if false, leave the character intact
  }

测试：

  string test = "encrypt me, please!";

  Console.WriteLine(test);
  Console.WriteLine(Encrypt(test));

结果：

  encrypt me, please!  
  fodszqu nf, qmfbtf!

Answer 2

一个天真的实现，不使用Linq立即在团结中玩弄

using System.Collections.Generic;
using UnityEngine;

public class Encryption : MonoBehaviour {

    public string testString = "Every lower case vowel gets replaced by the 'next' one.";

    Dictionary<char, char> charMap;
    string result = "";

    void Start () {

        charMap = new Dictionary<char, char>() {
            {'a','e'},
            {'e','i'},
            {'i','o'},
            {'o','u'},
            {'u','a'}
        };
        result = "";    

        for (int i = 0; i < testString.Length; i++) {

            result += charMap.ContainsKey(testString[i]) ? charMap[testString[i]] : testString[i];
        }

        Debug.Log(result);
    }

}

Unity - 如何将输入字符串等同于数组中的索引

2 个答案: