Simple Syntax Question

[czardas]

Select
    Case $var == 0
        $msg = "Do something"
    Case $var == 1
        $msg = "Do something else"
EndSelect

Select
    Case $var == 0
        $msg = "Do something"
    Case $var == 1
        $msg = "Do something else"
    Case Else
    ; Don't do anything.
EndSelect

Edit: Oops I hit post before I asked a question. Haha.

I hadn't even decided on the title.

Edited January 13, 2010 by czardas

[Melba23]

czardas,

And the question is?

I think the two Select structures are functionally identical. In the first snippet if $var is anything other than 0 or 1, it never matches a Case and so nothing happens - just like the second where it is explicit.

By the way, the use of the == operator is only to make case-sensitive comparisons between strings. Using it anywhere else is a waste of CPU cycles as it goes through a much more complicated algorithm than a plain =.

M23

[czardas]

czardas,

And the question is?

Sorry about the delay, No, the question is:

Is the first of the two above examples correct (without the 'Case Else' statement). Would that be considered bad syntax, even though it seems to work fine? The help file examples all include a 'Case Else' statement, which is the reason I ask.

And yes, they are meant to be identical statements. Thanks for pointing out that '==' should be '='. I made the post before I had finished editing. The variables I am compairing are actually letters in my original script.

Edited January 13, 2010 by czardas

[trancexx]

I guess in this case it would be more correct to use Switch... EndSwitch anyway.

Switch $var
    Case 0
        $msg = "Do something"
    Case 1
        $msg = "Do something else"
EndSwitch

[Melba23]

czardas,

Me again.

Personally, I only use a Case - ; Do nothing structure if I want to make it absolutely clear that I "do nothing" with certain values. But that is just me....

M23

[czardas]

Thanks for the responses. The actual script I'm writing uses some rather complicated arguments and I'm so used to relying on 'If' statements. I need to break out of the habit. I guess I'll try experimenting with 'Switch' as trancexx has shown.

Edit: I was missing the fact that the help file indicates that 'Case Else' is not required. It was the examples that threw me.

Edited January 13, 2010 by czardas