Prestwood IT: VB Classic Associative Array (Collection) (Visual Basic Classic)

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VB Classic Associative Array (Collection)

By Mike Prestwood

Posted 16 years ago on 11/10/2008 and updated 1/29/2009

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KB101580

General Info: Associative Array

A set of unique keys linked to a set of values. Each unique key is associated with a value. Think of it as a two column table. MyArray['CA'] = 'California' MyArray['AR'] = 'Arizona'

Languages Focus: Associative Array

Associative arrays are also known as a dictionary or a hash table in other languages.

VB Classic Associative Array

In addition to Add and Item, collections also offer Count and Remove. Notice that Add uses the format of Value, Key (which is backwards from many other languages).

Syntax Example:

Dim States As New Collection
   
States.Add "California", "CA"
States.Add "Nevada", "NV"
     
MsgBox (States.Item("CA"))

More Info

Definition:

Associative Array

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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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