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How to get hash code for the specified key of a Hashtable in C#?
To get hash code for the specified key of a Hashtable, the code is as follows −
Example
using System;
using System.Collections;
public class HashCode : Hashtable {
public static void Main(string[] args) {
HashCode hash = new HashCode();
hash.Add("A", "Jacob");
hash.Add("B", "Mark");
hash.Add("C", "Tom");
hash.Add("D", "Nathan");
hash.Add("E", "Tim");
hash.Add("F", "John");
hash.Add("G", "Gary");
Console.WriteLine("Key and Value pairs...");
foreach(DictionaryEntry entry in hash) {
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.Write("HashCode for key D =" + (hash.GetHash("D")) );
}
}Output
This will produce the following output −
Key and Value pairs... G and Gary A and Jacob B and Mark C and Tom D and Nathan E and Tim F and John HashCode for key D =-842352676
Example
Let us see another example −
using System;
using System.Collections;
public class HashCode : Hashtable {
public static void Main(string[] args) {
HashCode hash = new HashCode();
hash.Add('1', "One");
hash.Add('2', "Two");
hash.Add('3', "Three");
hash.Add('4', "Four");
Console.WriteLine("Key and Value pairs...");
foreach(DictionaryEntry entry in hash) {
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("HashCode for key 1 = " + (hash.GetHash('1')));
Console.WriteLine("HashCode for key 2 = " + (hash.GetHash('2')));
Console.WriteLine("HashCode for key 3 = " + (hash.GetHash('3')));
Console.WriteLine("HashCode for key 4 = " + (hash.GetHash('4')));
}
}Output
This will produce the following output −
Key and Value pairs... 3 and Three 2 and Two 4 and Four 1 and One HashCode for key 1 = 3211313 HashCode for key 2 = 3276850 HashCode for key 3 = 3342387 HashCode for key 4 = 3407924
Updated on: 16-Dec-2019
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