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: