Add Length property to FailSoftArray

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Add Length property to FailSoftArray. 
 
using System; 
 
class FailSoftArray {  
  int[] a; // reference to underlying array  
  int len; // length of array -- underlies Length property 
 
  public bool errflag; // indicates outcome of last operation 
   
  // Construct array given its size.  
  public FailSoftArray(int size) { 
    a = new int[size]; 
    len = size;  
  } 
 
  // Read-only Length property. 
  public int Length { 
    get { 
      return len; 
    } 
  } 
 
  // This is the indexer for FailSoftArray. 
  public int this[int index] { 
    // This is the get accessor. 
    get { 
      if(ok(index)) { 
        errflag = false; 
        return a[index]; 
      } else { 
        errflag = true; 
        return 0; 
      } 
    } 
 
    // This is the set accessor 
    set { 
      if(ok(index)) { 
        a[index] = value; 
        errflag = false; 
      } 
      else errflag = true; 
    } 
  } 
 
  // Return true if index is within bounds. 
  private bool ok(int index) { 
   if(index >= 0 & index < Length) return true; 
   return false; 
  } 
}  
  
// Demonstrate the improved fail-soft array. 
public class ImprovedFSDemo {  
  public static void Main() {  
    FailSoftArray fs = new FailSoftArray(5); 
    int x; 
 
    // can read Length 
    for(int i=0; i < fs.Length; i++) 
      fs[i] = i*10; 
 
    for(int i=0; i < fs.Length; i++) { 
      x = fs[i]; 
      if(x != -1) Console.Write(x + " "); 
    } 
    Console.WriteLine(); 
 
    // fs.Length = 10; // Error, illegal! 
  } 
}

1.	Override Properties
2.	enum based attribute
3.	A simple property example
4.	Convert errflag into a property
5.	Error handling in property setter validating
6.	Use properties to set and get private members
7.	Define properties for class
8.	Demonstrates the use of properties to control how values are saved in fields
9.	Illustrates the use of a property
10.	The use of an abstract property
11.	access to a private field through a property
12.	Properties: Use of Properties
13.	Properties: Side Effects When Setting Values
14.	Properties Accessors
15.	Delegates as Static Properties
16.	Properties:Static Properties
17.	Properties:Virtual Properties

Add Length property to FailSoftArray : Properties « Class Interface « C# / C Sharp

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