Question

How to initialize a HashSet from an array in C#

Answer 1

using System;
using System.Collections.Generic;
 
class Program
{
    public static void addToSet(int[] arr, HashSet<int> hset) {
        for (int i = 0; i < arr.Length; i++) {
            hset.Add(arr[i]);
        }
      
    }
    static void Main() {
        int[] arr = {1, 5, 7, 3, 9, 8, 0, 2};
        
        HashSet<int> hset = new HashSet<int>();
 
        addToSet(arr, hset);
        
        foreach (var item in hset) {
           Console.Write(item + " ");
        }
    }
}
 
 
 
 
/*
run:
             
1 5 7 3 9 8 0 2 
             
*/

 

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Answer 2

using System;
using System.Collections.Generic;

class Program
{
    static void Main() {
        int[] arr = {4, 6, 12, 3, 100, 99, 7, 0, 1};
        
        var hashset = new HashSet<int>(arr);

        foreach (var item in hashset) {
           Console.Write(item + " ");
        }
    }
}





/*
run:

4 6 12 3 100 99 7 0 1 

*/

 

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