Implicit Structure Notation ColdFusion

January 13, 2009

Implicit Structure Notation was added to ColdFusion 8, this allows you to create a struct on the fly in one line.

Here's a simple example of how the new short hand notation works:

<cfset person = { firstname="Pete", lastname="Freitag" }>

In Prior versions we might have done something like this, which is equivalent to the above code:

<cfset person = StructNew()>
<cfset person.firstname = "Pete">
<cfset person.lastname = "Freitag">

As you can see the new shortcut notation is very handy!

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Comments

On 12/23/2011 at 12:42:03 PM EST Erick Wilson wrote:

Pete, I know this is an old thread, but let me know if you've ever run into this problem before and know WHY it's doing it.

Put this code in a CFM file and run it to see what it's doing.

<cfscript> //testMethod(): testing the structure notation of CF public any function testMethod(required any arg1, required struct arg2, string arg3){ return arguments; }

goodStruct = StructNew(); goodStruct.var1 = DateFormat(Now(), 'mmm. d, yyyy'); goodStruct.var2 = testMethod(arg1=12, arg2={key1="value1",key2="value2"}, arg3="Good"); goodStruct.var3 = CreateODBCDateTime(Now());

badStruct = StructNew(); if(1 == 1){ badStruct.var1 = DateFormat(Now(), 'mmm. d, yyyy'); badStruct.var2 = testMethod(arg1=12, arg2={key1="value1",key2="value2"}, arg3="Good"); badStruct.var3 = CreateODBCDateTime(Now()); } </cfscript>

<cfdump var="#goodStruct#" label="Good Struct"> The above struct is NOT created inside an if statement and thus works as expected.

<cfdump var="#badStruct#" label="Bad Struct"> The above struct IS created inside an if statment and notice how the other variables get filled, but variable 1 gets removed from the struct? We know the IF statement is working because the other 2 variables get created and filled with expected data, but the first variable gets removed from the struct or is never set (my bet is on the former).

Sure would be interested in your take on the situation.

Thanks

On 12/23/2011 at 12:42:57 PM EST Erick Wilson wrote:

Forgot to mention, this is running on Adobe CF 9.01