C# | Removing all entries from HybridDictionary
HybridDictionary.Clear method is used to remove all entries from the HybridDictionary.
Syntax:
public void Clear ();
Below given are some examples to understand the implementation in a better way :
Example 1:
// C# code to removes all entries // from the HybridDictionary. using System; using System.Collections; using System.Collections.Specialized; class GFG { // Driver code public static void Main() { // Creating a HybridDictionary named myDict HybridDictionary myDict = new HybridDictionary(); // Adding key/value pairs in myDict myDict.Add( "A" , "Apple" ); myDict.Add( "B" , "Banana" ); myDict.Add( "C" , "Cat" ); myDict.Add( "D" , "Dog" ); myDict.Add( "E" , "Elephant" ); myDict.Add( "F" , "Fish" ); // Displaying the number of key/value // pairs in HybridDictionary myDict Console.WriteLine( "Number of key/value pairs in myDict are : " + myDict.Count); // Displaying the key/value pairs in myDict Console.WriteLine( "The key/value pairs in myDict are : " ); foreach (DictionaryEntry de in myDict) { Console.WriteLine(de.Key + " --> " + de.Value); } // Removing all entries from myDict myDict.Clear(); // Displaying the number of key/value // pairs in HybridDictionary myDict Console.WriteLine( "Number of key/value pairs in myDict are : " + myDict.Count); // Displaying the key/value pairs in myDict Console.WriteLine( "The key/value pairs in myDict are : " ); foreach (DictionaryEntry de in myDict) { Console.WriteLine(de.Key + " --> " + de.Value); } } } |
Output:
Number of key/value pairs in myDict are : 6 The key/value pairs in myDict are : A --> Apple B --> Banana C --> Cat D --> Dog E --> Elephant F --> Fish Number of key/value pairs in myDict are : 0 The key/value pairs in myDict are :
Example 2:
// C# code to removes all entries // from the HybridDictionary. using System; using System.Collections; using System.Collections.Specialized; class GFG { // Driver code public static void Main() { // Creating a HybridDictionary named myDict HybridDictionary myDict = new HybridDictionary(); // Adding key/value pairs in myDict myDict.Add( "I" , "first" ); myDict.Add( "II" , "second" ); myDict.Add( "III" , "third" ); myDict.Add( "IV" , "fourth" ); myDict.Add( "V" , "fifth" ); // Displaying the number of key/value // pairs in HybridDictionary myDict Console.WriteLine( "Number of key/value pairs in myDict are : " + myDict.Count); // Displaying the key/value pairs in myDict Console.WriteLine( "The key/value pairs in myDict are : " ); foreach (DictionaryEntry de in myDict) { Console.WriteLine(de.Key + " --> " + de.Value); } // Removing all entries from myDict myDict.Clear(); // Displaying the number of key/value // pairs in HybridDictionary myDict Console.WriteLine( "Number of key/value pairs in myDict are : " + myDict.Count); // Displaying the key/value pairs in myDict Console.WriteLine( "The key/value pairs in myDict are : " ); foreach (DictionaryEntry de in myDict) { Console.WriteLine(de.Key + " --> " + de.Value); } } } |
Output:
Number of key/value pairs in myDict are : 5 The key/value pairs in myDict are : I --> first II --> second III --> third IV --> fourth V --> fifth Number of key/value pairs in myDict are : 0 The key/value pairs in myDict are :
Note:
- Count is set to zero, and references to other objects from elements of the collection are also released.
- If the collection is already stored in a Hashtable, the collection remains in the Hashtable.
- This method is an O(n) operation, where n is Count.
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.specialized.hybriddictionary.clear?view=netframework-4.7.2
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