Exists Method

In This Topic

Description

Returns true if a specified key exists in the Dictionary object, false if it does not.

Syntax

Visual Basic
Public Function Exists( _ ByRef Key As Variant _ ) As Boolean

Parameters

Key: Key value being searched for in the Dictionary object.

Example

The following example illustrates the use of the Exists method.

Checking if an item exists (JScript)
Checking if an item exists (Visual Basic)

function keyExists(k)
{
   var fso, s = "";
   d = new ActiveXObject("Scripting.Dictionary");
   d.Add("a", "Athens");
   d.Add("b", "Belgrade");
   d.Add("c", "Cairo");
   if (d.Exists(k))
      s += "Specified key exists.";
   else 
      s += "Specified key doesn't exist.";
   return(s);
}

Function KeyExistsDemo
   Dim d, msg   ' Create some variables.
   Set d = CreateObject("Scripting.Dictionary")
   d.Add "a", "Athens"   ' Add some   keys and items.
   d.Add "b", "Belgrade"
   d.Add "c", "Cairo"
   If d.Exists("c") Then
      msg = "Specified key exists."
   Else
      msg = "Specified key doesn't exist."
   End If
   KeyExistsDemo = msg
End Function