Browse DevX
Sign up for e-mail newsletters from DevX

Tip of the Day
Language: Visual Basic
Expertise: Beginner
Mar 27, 1999



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Quick Check on Collection Key

You might need to determine whether a certain key is in a collection. The Collection object doesn't provide a method to retrieve a key after you add an object to the collection. Instead of keeping a separate list of the keys in the collection, use this function:
Public Function IsKeyInCollection(col As Collection, sKey _
	As String) As Boolean
	On Error Resume Next
	col (sKey)
	' this will cause an error if key is not in collection
	IsKeyInCollection = (Err.Number = 0)
End Function
You can easily modify this function to make it a property of a Collection class.
Alan Borowski
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date