On Sat, Aug 23, 2008 at 8:07 PM, Garrett Smith <[EMAIL PROTECTED]> wrote: >> On Aug 21, 2008, at 9:55 AM, Allen Wirfs-Brock wrote: >> >>> Or arguably "reconfigurable". >>> > On Thu, Aug 21, 2008 at 8:34 AM, Neil Mix <[EMAIL PROTECTED]> wrote: [snip]
> The closest I can come to defining "sealed" is Object.isSealed:-. > > | 15.2.3.12 Object.isSealed ( O ) > | When the isSealed function is called with argument O, > | the following steps are taken: > | 1. If Type(O) is not Object throw a TypeError exception. > | 2. For each named own data property P of O, > | a. Call the [[GetOwnProperty]] method of O with P. > | b. If the [[Flexible]] field of Result(2a) is true, then return false. > | 3. If the internal [[Extensible]] property of O is false, then return > | true. > | 4. Otherwise, return false. > | The length property of the Object.isSealed function is 1. > > > Back to the definition of [[Flexible]] > 1) true - property can be deleted using - delete - operator. > 2) false - property is sealed. What is sealed? > > So if the property is [[Flexible]], then the properties [[value]] must > be an object which cannot be modified. What? I'm confused. :-( > correction, I meant to write:- if [[Flexible]] is *false*, then the property's [[value]] must be an object which cannot be modified... (that is what I interpreted from the spec). Allen, Pratap: Please elucidate. > What is [[Flexible]]? Is it an object modifier/attribute or a property [snip] > Garrett > [snip] > [snip] > _______________________________________________ Es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
