Apparently, I answered that question a long time ago (and I am a little
ashamed of it, because there are a few obvious errors in it).
If you need to clear all elements, call the Clear method.
If you need to clear only specific elements, you can do this:
public static int RemoveAll(Hasht able hashtable, Predicate<Dicti onaryEntry>
predicate)
{
// The number of items removed.
int retVal = 0;
// Create space for the dictionary entries.
DictionaryEntry[] dictionaryEntri es = new
DictionaryEntry[hashtable.Count];
// Copy the keys.
hashtable.CopyT o(dictionaryEnt ries, 0);
// Iterate through the keys.
foreach (DictionaryEntr y dictionaryEntry in dictionaryEntri es)
{
// If the predicate is true, remove the item.
if (predicate(dict ionaryEntry))
{
// Remove the item.
hashtable.Remov e(dictionaryEnt ry.Key);
// Increment the count.
retVal ++;
}
}
// That's all folks.
return retVal;
}
The good thing about this is that in Orcas, you could place a "this" in
front of the Hashtable parameter and it will then be an extension method.
--
- Nicholas Paldino [.NET/C# MVP]
-
mv*@spam.guard. caspershouse.co m
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>The usual trick to get around the "collection was modified" problem by
looping through the collection backwards by index won't work with a
Hashtable because there is no way to access by index, right? How do I
loop through a Hashtable to selectively remove items?
Here are some examples.
http://www.thescripts.com/forum/thread256383.html
