C# | Copying BitArray elements to an Array
Last Updated :
01 Feb, 2019
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The BitArray class manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on i.e, 1 and false indicates the bit is off i.e, 0. This class is contained in System.Collections namespace.
BitArray.CopyTo(Array, Int32) method is used to copy the entire BitArray to a compatible one-dimensional Array, starting at the specified index of the target array.
Properties:
- The BitArray class is a collection class in which the capacity is always the same as the count.
- Elements are added to a BitArray by increasing the Length property.
- Elements are deleted by decreasing the Length property.
- Elements in this collection can be accessed using an integer index. Indexes in this collection are zero-based.
Syntax:
public void CopyTo (Array arr, int index);
Parameters:
- arr: It is the one-dimensional array which is the destination of the elements copied from BitArray. The Array must have zero-based indexing.
- index: It is the zero-based index in array at which copying begins.
Exceptions:
- ArgumentNullException : If the arr is null.
- ArgumentOutOfRangeException : If the index is less than zero.
- ArgumentException : If the arr is multidimensional OR the number of elements in the source BitArray is greater than the available space from index to the end of the destination array.
- InvalidCastException : If type of the source BitArray cannot be cast automatically to the type of the destination array.
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to copy BitArray to Array, // starting at the specified index // of the target array using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a BitArray BitArray myBitArr = new BitArray(4); myBitArr[0] = true; myBitArr[1] = true; myBitArr[2] = true; myBitArr[3] = true; // Creating a bool array bool[] myBoolArr = new bool[8]; myBoolArr[0] = false; myBoolArr[1] = false; // Copying BitArray to Array, // starting at the specified index // of the target array myBitArr.CopyTo(myBoolArr, 3); // Displaying elements in myBoolArr foreach(Object obj in myBoolArr) { Console.WriteLine(obj); } } } |
Output:
False False False True True True True False
Example 2:
// C# code to copy BitArray to Array, // starting at the specified index // of the target array using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a BitArray BitArray myBitArr = new BitArray(3); myBitArr[0] = true; myBitArr[1] = true; myBitArr[2] = true; // Creating a bool array bool[] myBoolArr = new bool[8]; myBoolArr[0] = false; myBoolArr[1] = false; myBoolArr[2] = false; // Copying BitArray to Array, // starting at the specified index // of the target array // This should raise "ArgumentOutOfRangeException" // as index is less than 0 myBitArr.CopyTo(myBoolArr, -2); // Displaying elements in myBoolArr foreach(Object obj in myBoolArr) { Console.WriteLine(obj); } } } |
Runtime Error:
Unhandled Exception:
System.ArgumentOutOfRangeException: Non-negative number required.
Parameter name: index
Note:
- The specified array must be of a compatible type. Only bool, int, and byte types of arrays are supported.
- This method uses Array.Copy to copy the elements.
- This method is an O(n) operation, where n is Count.
Reference:
