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Re: Binary data (ByteArray/ByteVector) proposal on public-script-coord

From: Oliver Hunt <oliver@apple.com>
Date: Thu, 5 Nov 2009 16:13:46 -0800
Cc: es-discuss@mozilla.org, public-script-coord@w3.org
Message-Id: <CCD1EFBB-BACF-4247-AD67-9247670C84C2@apple.com>
To: David-Sarah Hopwood <david-sarah@jacaranda.org>
On Nov 5, 2009, at 4:01 PM, David-Sarah Hopwood wrote:

> Charles Jolley wrote:
>> This looks like a good approach.  I wonder if the Data/DataBuilder
>> distinction could be handled better by using the Object.freeze()
>> semantics.  Even if the browser does not support freezing in the  
>> general
>> sense yet, you could borrow the ideas for data.
>>
>> Probably the wrong API names, but here is the basic idea:
>>
>> Data.prototype.copy()
>>  -> returns a mutable form of the Data object
>>
>> Data.prototype.freeze() or Data.freeze(aDataObject)
>>  -> makes the Data object frozen if it is not frozen already
>>
>> Data.prototype.frozenCopy()
>>  -> returns the data object but pre-frozen.  For Data object's  
>> already
>> frozen can return "this"
>>
>> Data.prototype.frozen - true when frozen, false otherwise.
>
> I don't know why we wouldn't just use Object.freeze. It is not  
> unreasonable
> to require support for the ES5 APIs as a prerequisite for the Data  
> type.

I disagree here -- i believe mutable vs. immutable data is different  
from unfrozen and frozen objects (though i agree that the function  
names freeze and frozen are just asking for problems in conjunction  
with ES5 :D ).  There are plenty of times where I would want to  
provide immutable data (the UA sharing content, etc), but i may still  
want to modify the object itself.

Basically i think we're attempting to conflate the ES object with the  
data wrapped by the ES object.

--Oliver

>
> -- 
> David-Sarah Hopwood  ⚥  http://davidsarah.livejournal.com
>
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Received on Friday, 6 November 2009 00:15:05 UTC

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