/// <summary>
/// Retrieves value from hash table with given key
/// </summary>
/// <param name="key">key</param>
/// <returns>value </returns>
public object Get(string key)
{
int keyValue = Hash(key);
if (Table[keyValue] == null)
{
return(null);
}
else if (Table[keyValue].Key == key)
{
return(Table[keyValue].getValue());
}
else
{
NodeH temp = Table[keyValue];
while (temp.Key != key || temp == null)
{
temp = temp.Next;
}
if (temp.Key == key)
{
return(temp.getValue());
}
else
{
return(null);
}
}
}
/// <summary>
/// Chechks to determine if key exists
/// </summary>
/// <param name="key">key </param>
/// <returns>true/false</returns>
public bool Contains(string key)
{
int keyValue = Hash(key);
if (Table[keyValue] == null)
{
return(false);
}
else if (Table[keyValue].Key == key)
{
return(true);
}
else
{
NodeH temp = Table[keyValue];
while (temp.Key != key && temp.Next != null)
{
temp = temp.Next;
}
if (temp.Key == key)
{
return(true);
}
else
{
return(false);
}
}
}
/// <summary>
/// Adds key value pairs to hash table
/// </summary>
/// <param name="key">key to add</param>
/// <param name="value">value to retrieve</param>
public void Add(string key, object value)
{
NodeH newHash = new NodeH(key, value);
int hashKey = Hash(key);
if (Table[hashKey] == null)
{
Table[hashKey] = newHash;
}
else
{
///Collision occurred, create new linked list on node
NodeH temp = Table[hashKey];
while (temp.Next != null)
{
temp = temp.Next;
}
temp.Next = newHash;
}
}
public NodeH(string key, object value)
{
Key = key;
Value = value;
Next = null;
}
public Hashtable(int buckets)
{
Buckets = buckets;
Table = new NodeH[Buckets];
}