Queue.Clone() Method in C#
This method is used to create a shallow copy of the Queue. It just creates a copy of the Queue. The copy will have a reference to a clone of the internal elements but not a reference to the original elements.
Syntax: public virtual object Clone ();
Return Value: The method returns an Object which is just the shallow copy of the Queue.
Example 1: Let’s see an example without using a Clone() method and directly copying a Queue using assignment operator ‘=’. In the below code, we can see even if we Dequeue() elements from myQueue2, contents of myQueue is also changed. This is because ‘=’ just assigns the reference of myQueue to myQueue2 and does not create any new Queue. But Clone() creates a new Queue.
using System;
using System.Collections;
class GFG {
public static void Main( string [] args)
{
Queue myQueue = new Queue();
myQueue.Enqueue( "Geeks" );
myQueue.Enqueue( "Class" );
myQueue.Enqueue( "Noida" );
myQueue.Enqueue( "UP" );
Queue myQueue2 = myQueue;
myQueue2.Dequeue();
PrintValues(myQueue);
}
public static void PrintValues(IEnumerable myCollection)
{
foreach (Object obj in myCollection)
Console.WriteLine(obj);
}
}
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Example 2: Here myQueue is unchanged.
using System;
using System.Collections;
class GFG {
public static void Main( string [] args)
{
Queue myQueue = new Queue();
myQueue.Enqueue( "Geeks" );
myQueue.Enqueue( "Class" );
myQueue.Enqueue( "Noida" );
myQueue.Enqueue( "UP" );
Queue myQueue2 = (Queue)myQueue.Clone();
myQueue2.Dequeue();
PrintValues(myQueue);
}
public static void PrintValues(IEnumerable myCollection)
{
foreach (Object obj in myCollection)
Console.WriteLine(obj);
Console.WriteLine();
}
}
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Output:
Geeks
Class
Noida
UP
Reference:
Last Updated :
15 Feb, 2019
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