[no subject]

No takers?


Dan Yargici wrote:


[...]

Anyway, if some of the more seasoned scripting types could cast a beady eye 
over this I'd really appreciate it. I did some things I'm just not sure 
about. First off, I iterate through the collection retuned by the duplicate 
command instead of enumerating it. Now I remember reading here many times 
that enumerating is faster, but it just seemed unecessary in this instance, 
am I right?


The thing is that is does not cost more to enumerate, as you pointed out. So 
why not using it?

The reason is that if you want to do things the proper way, you may put this 
little operation into a function. Then you will be able to easily reuse that 
function in other scripts. Now if those other scripts are performance 
sensitive, you'll just be glad you used the fastest loop code. Also, sooner 
or later, you or someone using your oringal script may come up with some 
design ideas, that will make your script do a lot more things. So any 
performance gain whatosever is welcomed, well, most of the time!


Also, I'm checking for whether the user pressed OK or Cancel by just 
checking if a return value exists. Is this a no no? It's seems fairly 
fool-proof to me.



This is also what I do, and am very happy that way. I use the technique 
shown by Michael Isner in Experience XSI 4, that is, a try/catch statement, 
that I put in a function. Then if the function returned nothing, the script 
stops and print a message telling why ("cancelled by user").


// Call function
var nValue = askUser();


// Test return value
if( nValue == null ) {
   logmessage( "cancelled by user.", siError );
} else {
   logmessage( nValue );
   // do something...
}


function askUser()
{
var oProp = activesceneroot.addproperty( "CustomProperty", false, "TellMe" 
);
var oParam = oProp.addparameter3( "Value", siInt2, 1, 0, 4, true, false );
try {
// Here's the important thing: the raise error being true,
// if the user cancels, the script will go to the catch statement
inspectobj( oProp, "", "TellMe", siModal, true );
nValue = oParam.value;
deleteobj( oProp );
return( nValue );
}
catch(a) {
deleteobj( oProp );
return( null );
}
}


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