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VB's OrElse (AndAlso) revisited

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Steve Hebert

Posts: 218
Nickname: sdhebert
Registered: Apr, 2005

Steve Hebert is a .NET developer who has created the .Math compiler library.

VB's OrElse (AndAlso) revisited

Posted: Apr 25, 2006 11:33 AM

This post originated from an RSS feed registered with .NET Buzz by Steve Hebert.
Original Post: VB's OrElse (AndAlso) revisited Feed Title: Steve Hebert's Development Blog Feed URL: /error.htm?aspxerrorpath=/blogs/steve.hebert/rss.aspx Feed Description: .Steve's .Blog - Including .Net, SQL Server, .Math and everything in between	Latest .NET Buzz Posts Latest .NET Buzz Posts by Steve Hebert Latest Posts From Steve Hebert's Development Blog

After reading Billy Hollis' explanation of Visual Basic's OrElse and AndAlso statements, I think it actually made me think less of VB.

I vaguely remember studying these for the Microsoft VB5 certification test 8 or 9 years ago. This is why the following statement doesn't short circuit and causes a runtime error if Value[index] == null:

if Value[index] Is Not Null and Value[index] = "1" then ...

Instead you have to write it as:

if Value[index] Is Not Null AndAlso Value[Index] = "1" then...

AndAlso??? AndAlso!?!? How could you implement those keywords without laughing the entire time you're doing it?

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