Comments on: iif function http://www.phpit.net/code/iif-function/ PHPit has dozens of PHP articles, codesnippets and FAQ's. Fri, 16 May 2008 07:54:29 +0000 http://wordpress.org/?v=2.0.4 by: Jason http://www.phpit.net/code/iif-function/#comment-2685 Thu, 25 May 2006 07:05:38 +0000 http://www.phpit.net/code/iif-function/#comment-2685 One last thought: there are cases where an operator might be preferred over a function, and vice versa. Functions will evaluate all arguments before executing, and ?: will perform short-circuit evaluation... this can lead to some unexpected behaviour if the arguments returntrue and returnfalse are actually the results of other function calls. It's best to plug the following code in and see the difference for yourself. One last thought: there are cases where an operator might be preferred over a function, and vice versa.

Functions will evaluate all arguments before executing, and ?: will perform short-circuit evaluation… this can lead to some unexpected behaviour if the arguments returntrue and returnfalse are actually the results of other function calls.

It’s best to plug the following code in and see the difference for yourself.

]]> by: Jason http://www.phpit.net/code/iif-function/#comment-2683 Thu, 25 May 2006 06:45:47 +0000 http://www.phpit.net/code/iif-function/#comment-2683 In response to Gaurav: Err, VB.NET *does* have an Iif function (look in Microsoft.VisualBasic), and it isn't just a holdover from the pre-.NET days either - there's just no other way unlike the ?: operator which exists in the C-like languages (C, C++, C#, Java, etc.). Additionally, VBA uses IIf (this shouldn't be a surprise, since VBA is a subset of VB) which means all your Office automation products, and SQL typically has IIf and CASE function equivalents in each of its many flavours (MSAccess, MSSQL, mySQL, Oracle, etc.) Other than that, I agree - it can be argued that the ?: operator *is* the equivalent of an Iif function - and thus you don't need to write your own function... the only reason I can think up is that of making code easier to read to the untrained eye. In response to Gaurav:

Err, VB.NET *does* have an Iif function (look in Microsoft.VisualBasic), and it isn’t just a holdover from the pre-.NET days either - there’s just no other way unlike the ?: operator which exists in the C-like languages (C, C++, C#, Java, etc.). Additionally, VBA uses IIf (this shouldn’t be a surprise, since VBA is a subset of VB) which means all your Office automation products, and SQL typically has IIf and CASE function equivalents in each of its many flavours (MSAccess, MSSQL, mySQL, Oracle, etc.)

Other than that, I agree - it can be argued that the ?: operator *is* the equivalent of an Iif function - and thus you don’t need to write your own function… the only reason I can think up is that of making code easier to read to the untrained eye.

]]> by: Gaurav http://www.phpit.net/code/iif-function/#comment-1716 Sat, 13 May 2006 17:35:03 +0000 http://www.phpit.net/code/iif-function/#comment-1716 Why do we need it when a simple ternary operator already exists... Also, would like to know which of the "most languages" have the iif function? PHP: No C: No C++: No PERL: No Python: No Java: No C#: No Visual Basic .Net: No J#: No Or am I missing something horribly? -Gaurav http://www.edujini.in Why do we need it when a simple ternary operator already exists…

Also, would like to know which of the “most languages” have the iif function?

PHP: No
C: No
C++: No
PERL: No
Python: No
Java: No
C#: No
Visual Basic .Net: No
J#: No

Or am I missing something horribly?

-Gaurav
http://www.edujini.in

]]> by: Mike http://www.phpit.net/code/iif-function/#comment-1291 Fri, 21 Apr 2006 09:25:39 +0000 http://www.phpit.net/code/iif-function/#comment-1291 Can this be adapted to produce multiple options? i.e. in Access I sometimes use something like output = IIF(a="1", "I am a", IIF(a="2", "I am b", "I am c")) Can this be adapted to produce multiple options? i.e. in Access I sometimes use something like

output = IIF(a=”1″, “I am a”, IIF(a=”2″, “I am b”, “I am c”))

]]> by: Ezine Articles » Track your visitors, using PHP http://www.phpit.net/code/iif-function/#comment-220 Sat, 26 Nov 2005 08:47:49 +0000 http://www.phpit.net/code/iif-function/#comment-220 [...] Note: I used a function in the above example called iif(). You can get this function at http://www.phpit.net/code/iif-function. [...] […] Note: I used a function in the above example called iif(). You can get this function at http://www.phpit.net/code/iif-function. […]

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