C# | Copy the Stack to an Array
Stack<T>.CopyTo(T[], Int32) Method is used to copy the Stack<T> to an existing 1-D Array which starts from the specified array index.
Properties:
- The capacity of a Stack<T>is the number of elements the Stack<T> can hold. As elements are added to a Stack<T> , the capacity is automatically increased as required through reallocation.
- If Count is less than the capacity of the Stack<T> , Push is an O(1) operation. If the capacity needs to be increased to accommodate the new element, Push becomes an O(n) operation, where n is Count. Pop is an O(1) operation.
- Stack accepts null as a valid value and allows duplicate elements.
Syntax:
public void CopyTo (T[] array, int arrayIndex);
Parameters:
array: The one-dimensional Array that is the destination of the elements copied from Stack<T>. The Array must have zero-based indexing.
arrayIndex: The zero-based index in array at which copying begins.
Exceptions:
- ArgumentNullException : If an array is null.
- ArgumentOutOfRangeException : If the arrayIndex is less than zero.
- ArgumentException : The number of elements in the source Stack<T> is greater than the available space from arrayIndex to the end of the destination array.
Below given are some examples to understand the implementation in a better way:
Example 1:
using System;
using System.Collections.Generic;
class GFG {
public static void Main()
{
Stack< string > myStack = new Stack< string >();
myStack.Push( "Geeks" );
myStack.Push( "Geeks Classes" );
myStack.Push( "Noida" );
myStack.Push( "Data Structures" );
myStack.Push( "GeeksforGeeks" );
string [] arr = new string [myStack.Count];
myStack.CopyTo(arr, 0);
foreach ( string str in arr)
{
Console.WriteLine(str);
}
}
}
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Output:
GeeksforGeeks
Data Structures
Noida
Geeks Classes
Geeks
Example 2:
using System;
using System.Collections.Generic;
class GFG {
public static void Main()
{
Stack< int > myStack = new Stack< int >();
myStack.Push(2);
myStack.Push(3);
myStack.Push(4);
myStack.Push(5);
myStack.Push(6);
int [] arr = new int [myStack.Count];
myStack.CopyTo(arr, 0);
foreach ( int i in arr)
{
Console.WriteLine(i);
}
}
}
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Reference:
Last Updated :
01 Feb, 2019
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