Object.is steps are very thing

Allen Wirfs-Brock allen at wirfs-brock.com
Sat Mar 16 16:06:32 PDT 2013


On Mar 16, 2013, at 3:40 PM, David Bruant wrote:

> Le 16/03/2013 19:18, Tom Schuster a écrit :
>> Hey!
>> 
>> Looking at the the steps for Object.is the first sentence just says:
>>> "When the is function is called with arguments value1 and value2 the following steps are taken:"
>> I don't remember other functions being defined like that. It should at
>> least say something along the lines of
>> "When called with less than 2 parameters return false."
> I'd throw a TypeError. Calling Object.is with strictly more or less than 2 parameters is most likely an error, akin to === with which something different than strictly 2 operands resultsis a SyntaxError.


ECMAScript has a well established convention of using undefined for any non-supplied argument values.  It's preferable to consistently follow such conventions. 

Allen







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