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:
// C# code to Copy the Stack to an Array using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Stack of strings Stack< string > myStack = new Stack< string >(); // Inserting the elements into the Stack myStack.Push( "Beginner" ); myStack.Push( "Beginner Classes" ); myStack.Push( "Noida" ); myStack.Push( "Data Structures" ); myStack.Push( "w3wiki" ); // Creating a string array arr string [] arr = new string [myStack.Count]; // Copying the elements of stack into array arr myStack.CopyTo(arr, 0); // Displaying the elements in array arr foreach ( string str in arr) { Console.WriteLine(str); } } } |
Output:
w3wiki Data Structures Noida Beginner Classes Beginner
Example 2:
// C# code to Copy the Stack to an Array using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Stack of Integers Stack< int > myStack = new Stack< int >(); // Inserting the elements into the Stack myStack.Push(2); myStack.Push(3); myStack.Push(4); myStack.Push(5); myStack.Push(6); // Creating an Integer array arr int [] arr = new int [myStack.Count]; // Copying the elements of stack into array arr myStack.CopyTo(arr, 0); // Displaying the elements in array arr foreach ( int i in arr) { Console.WriteLine(i); } } } |
Output:
6 5 4 3 2
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.stack-1.copyto?view=netframework-4.7.2