Csharp/C Sharp/Collections Data Structure/BitArray

Demonstrate BitArray

<source lang="csharp"> // Demonstrate BitArray.

using System; using System.Collections;

public class BADemo {

 public static void showbits(string rem, 
                        BitArray bits) { 
   Console.WriteLine(rem); 
   for(int i=0; i < bits.Count; i++) 
     Console.Write("{0, -6} ", bits[i]); 
   Console.WriteLine("\n"); 
 } 

 public static void Main() { 
   BitArray ba = new BitArray(8); 
   byte[] b = { 67 }; 
   BitArray ba2 = new BitArray(b); 
    
   showbits("Original contents of ba:", ba); 
      
   ba = ba.Not(); 

   showbits("Contents of ba after Not:", ba); 

   showbits("Contents of ba2:", ba2); 

   BitArray ba3 = ba.Xor(ba2); 

   showbits("Result of ba XOR ba2:", ba3); 
 } 

}

      </source>

illustrates the use of a BitArray

<source lang="csharp"> /*

 illustrates the use of a BitArray

• /

using System; using System.Collections; public class Example11_4 {

 public static void Main()
 {
   // create a BitArray object
   BitArray myBitArray = new BitArray(4);
   // display the Length property
   Console.WriteLine("myBitArray.Length = " +
     myBitArray.Length);
   // set the four elements of the BitArray
   myBitArray[0] = false;
   myBitArray[1] = true;
   myBitArray[2] = true;
   myBitArray[3] = false;
   // display the elements of the BitArray
   for (int counter = 0; counter < myBitArray.Count; counter++)
   {
     Console.WriteLine("myBitArray[" + counter + "] = " +
       myBitArray[counter]);
   }
 }

}

      </source>

illustrates the use of BitArray methods

<source lang="csharp"> /* Mastering Visual C# .NET by Jason Price, Mike Gunderloy Publisher: Sybex; ISBN: 0782129110

• /

/*

 Example11_5.cs illustrates the use of BitArray methods

• /

using System; using System.Collections; public class Example11_5 {

 // the DisplayBitArray() method displays the elements in the
 // supplied BitArray
 public static void DisplayBitArray(
   string arrayListName, BitArray myBitArray
 )
 {
   for (int counter = 0; counter < myBitArray.Count; counter++)
   {
     Console.WriteLine(arrayListName + "[" + counter + "] = " +
       myBitArray[counter]);
   }
 }
 public static void Main()
 {
   // create a BitArray object
   BitArray myBitArray = new BitArray(4);
   myBitArray[0] = false;
   myBitArray[1] = true;
   myBitArray[2] = true;
   myBitArray[3] = false;
   DisplayBitArray("myBitArray", myBitArray);
   // create another BitArray object, passing myBitArray to
   // the constructor
   BitArray anotherBitArray = new BitArray(myBitArray);
   DisplayBitArray("anotherBitArray", myBitArray);
   // use the Not() method to reverse the elements in myBitArray
   Console.WriteLine("Using the Not() method to reverse the element\n" +
     " values in myBitArray");
   myBitArray.Not();
   DisplayBitArray("myBitArray", myBitArray);
   // use the Or() method to perform an OR operation on the elements
   // in myBitArray and anotherBitArray
   Console.WriteLine("Using the Or() method to perform an OR operation on\n" +
     " the elements in myBitArray and anotherBitArray");
   myBitArray.Or(anotherBitArray);
   DisplayBitArray("myBitArray", myBitArray);
 }

}

      </source>

Use BitArray collection as Flag

<source lang="csharp"> using System; using System.Collections; public class Starter {

   public static void Main() {
       Hashtable employees = new Hashtable();
       employees.Add("A100", new Employee("Ben", true, false, true));
       employees.Add("V100", new Employee("Valerie", false, false, true));
       Participation((Employee)employees["A100"]);
       Participation((Employee)employees["V100"]);
   }
   public static void Participation(Employee person) {
       Console.WriteLine(person.Name + ":");
       if (person.InProfitSharing) {
           Console.WriteLine(" Participating in Profit Sharing");
       }
       if (person.InHealthPlan) {
           Console.WriteLine(" Participating in Health Plan");
       }
       if (person.InCreditUnion) {
           Console.WriteLine(" Participating in Credit Union");
       }
   }

} public class Employee {

   public Employee(string emplName) {
       propName = emplName;
       eflags.SetAll(true);
   }
   public Employee(string emplName,
                   bool profitSharing,
                   bool healthPlan,
                   bool creditUnion) {
       propName = emplName;
       InProfitSharing = profitSharing;
       InHealthPlan = healthPlan;
       InCreditUnion = creditUnion;
   }
   private BitArray eflags = new BitArray(3);
   public bool InProfitSharing {
       set {
           eflags.Set(0, value);
       }
       get {
           return eflags.Get(0);
       }
   }
   public bool InHealthPlan {
       set {
           eflags.Set(1, value);
       }
       get {
           return eflags.Get(1);
       }
   }
   public bool InCreditUnion {
       set {
           eflags.Set(2, value);
       }
       get {
           return eflags.Get(2);
       }
   }
   private string propName;
   public string Name {
       get {
           return propName;
       }
   }

}

      </source>