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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
namespace Pfz.Collections
{
/// <summary>
/// Read-only wrapper for hashsets.
/// </summary>
[Serializable]
public sealed class ReadOnlyHashSet<T>:
ICollection<T>
{
private HashSet<T> fHashSet;
/// <summary>
/// Creates a new read-only hashset wrapper over a modifiable hashset.
/// </summary>
public ReadOnlyHashSet(HashSet<T> modifiableHashset)
{
if (modifiableHashset == null)
throw new ArgumentNullException("modifiableHashset");
fHashSet = modifiableHashset;
}
/// <summary>
/// Gets the number of items in this hashset.
/// </summary>
public int Count
{
get
{
return fHashSet.Count;
}
}
/// <summary>
/// Returns an enumerator to iterate through all items in this
/// hashset.
/// </summary>
public IEnumerator<T> GetEnumerator()
{
return fHashSet.GetEnumerator();
}
/// <summary>
/// Returns true if the given item exists in this hashset, otherwise
/// false.
/// </summary>
public bool Contains(T item)
{
return fHashSet.Contains(item);
}
/// <summary>
/// Copies the values of this hashset to an array.
/// </summary>
public void CopyTo(T[] array)
{
fHashSet.CopyTo(array);
}
/// <summary>
/// Copies the values of this hashset to an array, beginning
/// at the given destination index.
/// </summary>
public void CopyTo(T[] array, int arrayIndex)
{
fHashSet.CopyTo(array, arrayIndex);
}
/// <summary>
/// Copies the given count items from this hashset to an array,
/// beginning at the given destination index.
/// </summary>
public void CopyTo(T[] array, int arrayIndex, int count)
{
fHashSet.CopyTo(array, arrayIndex, count);
}
/// <summary>
/// Determines wheter this hashset is a proper subset of the other
/// collection.
/// </summary>
public bool IsProperSubsetOf(IEnumerable<T> other)
{
return fHashSet.IsProperSubsetOf(other);
}
/// <summary>
/// Determines wheter this hashset is a proper superset of the other
/// collection.
/// </summary>
public bool IsProperSupersetOf(IEnumerable<T> other)
{
return fHashSet.IsProperSupersetOf(other);
}
/// <summary>
/// Determines wheter this hashset is a subset of the other
/// collection.
/// </summary>
public bool IsSubsetOf(IEnumerable<T> other)
{
return fHashSet.IsSubsetOf(other);
}
/// <summary>
/// Determines wheter this hashset is a superset of the other
/// collection.
/// </summary>
public bool IsSupersetOf(IEnumerable<T> other)
{
return fHashSet.IsSupersetOf(other);
}
/// <summary>
/// Determines wheter this hashset overlaps the other collection.
/// </summary>
public bool Overlaps(IEnumerable<T> other)
{
return fHashSet.Overlaps(other);
}
#region ICollection<T> Members
void ICollection<T>.Add(T item)
{
throw new ReadOnlyException();
}
void ICollection<T>.Clear()
{
throw new ReadOnlyException();
}
bool ICollection<T>.IsReadOnly
{
get
{
return true;
}
}
bool ICollection<T>.Remove(T item)
{
throw new ReadOnlyException();
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
#endregion
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).