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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. class ProgrammingLanguagesHashSet
  5. {
  6.     static void Main()
  7.     {
  8.         Console.WriteLine("Programming Languages HashSet Demo:");
  9.         Console.WriteLine("===================================");
  10.  
  11.         // Create HashSets for different programming paradigms
  12.         HashSet<string> webLanguages = new HashSet<string>();
  13.         HashSet<string> systemLanguages = new HashSet<string>();
  14.  
  15.         // Add web development languages
  16.         webLanguages.Add("JavaScript");
  17.         webLanguages.Add("TypeScript");
  18.         webLanguages.Add("PHP");
  19.         webLanguages.Add("Python");
  20.         webLanguages.Add("Ruby");
  21.         webLanguages.Add("JavaScript"); // Try to add duplicate - will be ignored
  22.  
  23.         Console.WriteLine("Web Development Languages:");
  24.         Console.Write("webLanguages contains {0} elements: ", webLanguages.Count);
  25.         DisplayHashSet(webLanguages);
  26.  
  27.         // Add system programming languages
  28.         systemLanguages.Add("C");
  29.         systemLanguages.Add("C++");
  30.         systemLanguages.Add("Rust");
  31.         systemLanguages.Add("Go");
  32.         systemLanguages.Add("Python"); // Python appears in both sets
  33.  
  34.         Console.WriteLine("System Programming Languages:");
  35.         Console.Write("systemLanguages contains {0} elements: ", systemLanguages.Count);
  36.         DisplayHashSet(systemLanguages);
  37.  
  38.         // Test adding duplicate
  39.         bool wasAdded = webLanguages.Add("PHP");
  40.         Console.WriteLine("\nTrying to add PHP again to webLanguages: " + wasAdded);
  41.  
  42.         // Create a union of both sets
  43.         HashSet<string> allLanguages = new HashSet<string>(webLanguages);
  44.         Console.WriteLine("\nCreating union of web and system languages...");
  45.         allLanguages.UnionWith(systemLanguages);
  46.  
  47.         Console.Write("allLanguages (union) contains {0} elements: ", allLanguages.Count);
  48.         DisplayHashSet(allLanguages);
  49.  
  50.         // Find intersection (languages common to both sets)
  51.         HashSet<string> commonLanguages = new HashSet<string>(webLanguages);
  52.         commonLanguages.IntersectWith(systemLanguages);
  53.  
  54.         Console.Write("\nCommon languages (intersection) contains {0} elements: ", commonLanguages.Count);
  55.         DisplayHashSet(commonLanguages);
  56.  
  57.         // Find languages only in web development (difference)
  58.         HashSet<string> webOnlyLanguages = new HashSet<string>(webLanguages);
  59.         webOnlyLanguages.ExceptWith(systemLanguages);
  60.  
  61.         Console.Write("\nWeb-only languages (difference) contains {0} elements: ", webOnlyLanguages.Count);
  62.         DisplayHashSet(webOnlyLanguages);
  63.  
  64.         // Test subset relationship
  65.         HashSet<string> scriptingLanguages = new HashSet<string> {"JavaScript", "Python"};
  66.         Console.WriteLine("\nIs scriptingLanguages a subset of webLanguages? " + 
  67.                          scriptingLanguages.IsSubsetOf(webLanguages));
  68.     }
  69.  
  70.     private static void DisplayHashSet(HashSet<string> set)
  71.     {
  72.         Console.Write("{ ");
  73.         foreach (string language in set)
  74.         {
  75.             Console.Write(language + " ");
  76.         }
  77.         Console.WriteLine("}");
  78.     }
  79. }
Success #stdin #stdout 0.06s 26948KB
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Programming Languages HashSet Demo:
===================================
Web Development Languages:
webLanguages contains 5 elements: { JavaScript TypeScript PHP Python Ruby }
System Programming Languages:
systemLanguages contains 5 elements: { C C++ Rust Go Python }

Trying to add PHP again to webLanguages: False

Creating union of web and system languages...
allLanguages (union) contains 9 elements: { JavaScript TypeScript PHP Python Ruby C C++ Rust Go }

Common languages (intersection) contains 1 elements: { Python }

Web-only languages (difference) contains 4 elements: { JavaScript TypeScript PHP Ruby }

Is scriptingLanguages a subset of webLanguages? True
https://ideone.com/XK3m6W
language:
C# (NET 6.0)
created:
17 hours ago
visibility:
public

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