SortedList::RemoveAt Method (Int32)
Removes the element at the specified index of a SortedList object.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- index
-
Type:
System::Int32
The zero-based index of the element to remove.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | index is outside the range of valid indexes for the SortedList object. |
| NotSupportedException |
The index sequence is based on the sort sequence. When an element is added, it is inserted into SortedList in the correct sort order, and the indexing adjusts accordingly. When an element is removed, the indexing also adjusts accordingly. Therefore, the index of a specific key/value pair might change as elements are added or removed from the SortedList object.
In collections of contiguous elements, such as lists, the elements that follow the removed element move up to occupy the vacated spot. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table.
This method is an O(n) operation, where n is Count.
The following code example shows how to remove elements from a SortedList object.
#using <system.dll> using namespace System; using namespace System::Collections; void PrintKeysAndValues( SortedList^ myList ) { Console::WriteLine( "\t-KEY-\t-VALUE-" ); for ( int i = 0; i < myList->Count; i++ ) { Console::WriteLine( "\t{0}:\t{1}", myList->GetKey( i ), myList->GetByIndex( i ) ); } Console::WriteLine(); } int main() { // Creates and initializes a new SortedList. SortedList^ mySL = gcnew SortedList; mySL->Add( "3c", "dog" ); mySL->Add( "2c", "over" ); mySL->Add( "1c", "brown" ); mySL->Add( "1a", "The" ); mySL->Add( "1b", "quick" ); mySL->Add( "3a", "the" ); mySL->Add( "3b", "lazy" ); mySL->Add( "2a", "fox" ); mySL->Add( "2b", "jumped" ); // Displays the SortedList. Console::WriteLine( "The SortedList initially contains the following:" ); PrintKeysAndValues( mySL ); // Removes the element with the key "3b". mySL->Remove( "3b" ); // Displays the current state of the SortedList. Console::WriteLine( "After removing \"lazy\":" ); PrintKeysAndValues( mySL ); // Removes the element at index 5. mySL->RemoveAt( 5 ); // Displays the current state of the SortedList. Console::WriteLine( "After removing the element at index 5:" ); PrintKeysAndValues( mySL ); } /* This code produces the following output. The SortedList initially contains the following: -KEY- -VALUE- 1a: The 1b: quick 1c: brown 2a: fox 2b: jumped 2c: over 3a: the 3b: lazy 3c: dog After removing "lazy": -KEY- -VALUE- 1a: The 1b: quick 1c: brown 2a: fox 2b: jumped 2c: over 3a: the 3c: dog After removing the element at index 5: -KEY- -VALUE- 1a: The 1b: quick 1c: brown 2a: fox 2b: jumped 3a: the 3c: dog */
Available since 10
.NET Framework
Available since 1.1