Question

How to convert string array to dictionary with key as index and string as value in C#

Answer 1

using System;
using System.Linq;
 
class Program
{
    static void Main() {
        string[] arr = { "c#", "java", "c", "c++", "python" };
 
        var dictionary = arr.Select((index, value) => new { index, value })
                            .ToDictionary(pair => pair.value, pair => pair.index);
                      
        foreach (var dic in dictionary)
            Console.WriteLine("{0} - {1}", dic.Key, dic.Value);
    }
}
 
 
 
/*
run:
 
0 - c#
1 - java
2 - c
3 - c++
4 - python
 
*/

 

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Answer 2

using System;
using System.Collections.Generic;
 
class Program
{
    static void Main() {
        string[] arr = { "c#", "java", "c", "c++", "python" };
 
        var dictionary = new Dictionary<int, string>();
        
        for (int i = 0; i < arr.Length; i++) {
            dictionary[i] = arr[i];
        }
                      
        foreach (var dic in dictionary)
            Console.WriteLine("{0} - {1}", dic.Key, dic.Value);
    }
}
 
 
 
/*
run:
 
0 - c#
1 - java
2 - c
3 - c++
4 - python

*/

 

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