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From Sven Helmberger <>
Subject Re: null
Date Thu, 08 Jan 2009 13:37:13 GMT
Noah Slater schrieb:
> On Thu, Jan 08, 2009 at 02:21:27PM +0100, Sven Helmberger wrote:
>> Shouldn't couchdb treat null and undefined values the same?
> Well, a "null" value is a way of saying "this doesn't have a value" but when
> something is undefined, you don't know if it has a value or not. The difference
> is subtle, but it's an important one.
>> I am aware that there is in fact a difference in javascript, but since
>> there is no "undefined" keyword for JSON, I would argue that that should
>> not be the case for JSON and couchdb.
> Well, an undefined value is by definition, undefined.

in javascript, "undefined" is a keyword for an undefined value. exactly 
the value that doc._rev has when doc has no property _rev.

The absence of an "undefined" keyword leads me to the expectation that 
for JSON {} should be the same as {"foo":null}.

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