|Count (get)||Gets the number of elements contained in the Queue.|
|Clear||Removes all items from the Queue.|
|Clone||Creates a shallow copy of the Queue.|
|Contains||Determines whether an element is in the Queue.|
|CopyTo||Copies the Queue elements to an existing one-dimensional array, starting at the specified array index.|
|Dequeue||Removes and returns the item at the beginning of the Queue.|
|Enqueue||Adds an item to the tail of the Queue, expanding the queue as necessary.|
|Equals||Returns a boolean indicating if the value and this object instance are the same instance.|
|GetEnumerator||Returns an enumerator for the queue.|
|GetHashCode||Returns a pseudo-unique number identifying this instance.|
|Peek||Returns the item at the beginning of the Queue without removing it.|
|ToArray||Copies the Queue elements to a new array.|
|ToString||Returns a string representation of this object instance.|
|TrimToSize||Sets the capacity to the actual number of elements in the Queue.|
Queues are useful for storing messages in the order they were received for sequential processing. This class implements a queue as a circular array. Values stored in a Queue are inserted at one end and removed from the other.
The capacity of a Queue is the number of elements the Queue can hold. As elements are added to a Queue, the capacity is automatically increased as required through reallocation. The capacity can be decreased by calling TrimToSize.
The following example shows how to create and add values to a Queue and how to print out its values.
Public Sub Main() ' Creates and initializesa new Queue. Dim MyQ As New Queue MyQ.Enqueue "Hello" MyQ.Enqueue "World" MyQ.Enqueue "!" ' Displays the properties and values of the Queue. Debug.Print "MyQ" Debug.Print " Count: " & MyQ.Count Debug.Print " Values:"; PrintValues MyQ End Sub Private Sub PrintValues(ByVal MyCollection As IEnumerable) Dim Item As Variant For Each Item In MyCollection Debug.Print " " & Item; Next Debug.Print End Sub ' The example code produces the following output. ' ' MyQ ' Count: 3 ' Values: Hello World !
Project CorLib Overview
Class Queue Overview