I think it's a fine suggestion. However, I still think a function should
have to declare that it may return null values:
<cffunction name="getCustomer" returntype="Customer" allownull="yes">
...
</cffunction>
AllowNull should be defaulted to "no". That would be backwards compatible
with the existing ColdFusion code which is blissfully unaware of null
values.
Ben Rogers
http://www.c4.net
v.508.240.0051
f.508.240.0057
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
> Of Vince Bonfanti
> Sent: Friday, May 13, 2005 9:03 AM
> To: [email protected]
> Subject: RE: [CFCDev] Null values (was CFC wish-list)
>
> What if the concept of null values was introduced via two new functions:
> NullNew() and IsNull()? I could assign a null value to variables with the
> first function:
>
> <cfset myNull=NullNew()>
>
> <cfreturn NullNew()>
>
> You could also use NullNew() to pass null values to Java function instead
> of
> using JavaCast("null", "").
>
> For purposes of type-checking for CFARGUMENT and CFRETURN, a value
> returned
> by NullNew() will match any type.
>
> For those who want loose typing, a value return by NullNew() will look
> like
> an empty string. In other words, the following CFIFs would both evaluate
> to
> TRUE:
>
> <cfif IsNull( myNull )>
>
> <cfif myNull EQ "">
>
> It seems to me that this would be fully backwards-compatible and be
> relatively easy to implement.
>
> Vince Bonfanti
> http://blog.newatlanta.com
>
> New Atlanta Communications, LLC
> http://www.newatlanta.com
>
>
>
>
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