Removes the element with the specified key from the
IDictionary.
Syntax
| Visual Basic (Declaration) | |
|---|
Public Overloads Function Remove( _
ByVal key As TKey _
) As Boolean |
Parameters
- key
- The key of the element to remove.
Return Value
true if the element is successfully removed; otherwise, false. This method also returns false if
key was not found in the original
IDictionary.
Exceptions
Example
Library/Library.Test/TestBTreeDictionary.cs
| C# |  Copy Code |
|---|
BTreeDictionary<int, string> data = new BTreeDictionary<int, string>();
data.Add(1, "a");
data.Add(2, "b");
data.Add(3, "c");
data.Add(4, "d");
data.Add(5, "e");
Assert.AreEqual(1, data.First().Key);
Assert.AreEqual("a", data.First().Value);
data.Remove(1);
Assert.AreEqual(2, data.First().Key);
Assert.AreEqual("b", data.First().Value);
Assert.AreEqual(5, data.Last().Key);
Assert.AreEqual("e", data.Last().Value);
data.Remove(5);
Assert.AreEqual(4, data.Last().Key);
Assert.AreEqual("d", data.Last().Value);
data.Remove(4);
data.Remove(3);
KeyValuePair<int, string> kv;
Assert.IsTrue(data.TryGetLast(out kv));
Assert.IsTrue(data.TryGetFirst(out kv));
data.Remove(2);
Assert.IsFalse(data.TryGetLast(out kv));
Assert.IsFalse(data.TryGetFirst(out kv));
try
{
data.First();
Assert.Fail("Should raise InvalidOperationException");
}
catch (InvalidOperationException)
{
}
try
{
data.Last();
Assert.Fail("Should raise InvalidOperationException");
}
catch (InvalidOperationException)
{
} |
| VB.NET | Copy Code |
|---|
Dim data As New BTreeDictionary(Of Integer, String)()
data.Add(1, "a")
data.Add(2, "b")
data.Add(3, "c")
data.Add(4, "d")
data.Add(5, "e")
Assert.AreEqual(1, data.First().Key)
Assert.AreEqual("a", data.First().Value)
data.Remove(1)
Assert.AreEqual(2, data.First().Key)
Assert.AreEqual("b", data.First().Value)
Assert.AreEqual(5, data.Last().Key)
Assert.AreEqual("e", data.Last().Value)
data.Remove(5)
Assert.AreEqual(4, data.Last().Key)
Assert.AreEqual("d", data.Last().Value)
data.Remove(4)
data.Remove(3)
Dim kv As KeyValuePair(Of Integer, String)
Assert.IsTrue(data.TryGetLast(kv))
Assert.IsTrue(data.TryGetFirst(kv))
data.Remove(2)
Assert.IsFalse(data.TryGetLast(kv))
Assert.IsFalse(data.TryGetFirst(kv))
Try
data.First()
Assert.Fail("Should raise InvalidOperationException")
Catch generatedExceptionName As InvalidOperationException
End Try
Try
data.Last()
Assert.Fail("Should raise InvalidOperationException")
Catch generatedExceptionName As InvalidOperationException
End Try |
Requirements
Target Platforms: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7
See Also
