Rick, Duplicate() is a function that does just what it sounds like--and is
especially useful when dealing with deeply nested complex vars like
structures, but it doesn't have anything to do with the shared scope issue.
You might be thinking of a technique for turning a shared scope variable
into a local variable, massaging it and then saving it as a shared-scope
variable again. Like this:
<cflock scope="session" type="readonly">
<cfset localBigStructure = Duplicate( session.BigStructure )>
</cflock>
....do a bunch of stuff to localBigStructure...
<cflock scope="session" type="exclusive">
<cfset session.BigStructure = Duplicate( localBigStructure )>
</cflock>
Hal Helms
== See ColdFusionTraining.com for info on "Best Practices with ColdFusion &
Fusebox" training ==
-----Original Message-----
From: Rick Lamb [mailto:[EMAIL PROTECTED]]
Sent: Saturday, February 24, 2001 10:27 PM
To: CF-Talk
Subject: duplicate() or readonly lock?
I have some confusion on reading shared memory variables. I've been using a
read locks to read shared memory variables to a request scope for using
through the site, but I've recently heard of people using the duplicate()
function to read shared memory variables. Can anybody help me why I should
use one method over the other? Also, with the duplicate function do I still
need to lock it?
Thanks for any help on this. I'm thoroughly confused on this already
confusion subject.
Rick
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