Forum OpenACS Development: Re: passing arguments, ad_proc definitions

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13: Re: passing arguments, ad_proc definitions (response to 1)
Posted by Torben Brosten on 11/30/10 08:39 PM
Actually, one can differentiate between an empty value and a nonexistent value using this technique. An empty value is when a named parameter is passed and it's paired value is empty. A named parameter that is not passed *is* nonexisting.
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14: Re: passing arguments, ad_proc definitions (response to 13)
Posted by Dave Bauer on 11/30/10 08:43 PM
Correct. When you name the paramter do NOT specify a default value and then you can use info exists to check if it was specified or not.