- From: Garrett Smith <dhtmlkitchen@gmail.com>
- Date: Mon, 26 Aug 2013 10:05:07 -0700
- To: bugzilla@jessica.w3.org
- Cc: public-script-coord@w3.org
On 8/25/13, bugzilla@jessica.w3.org <bugzilla@jessica.w3.org> wrote: > https://www.w3.org/Bugs/Public/show_bug.cgi?id=23056 > > --- Comment #3 from Boris Zbarsky <bzbarsky@mit.edu> --- > The ES6 spec is a bit unclear here. > > In particular, see section 8.3.16.6 in the draft you link to, which > explicitly > sets the length to the ExpectedArgumentCount of the ParameterList. And the > definition of that is on page 201 (section 13.1) and returns: > ExpectedArgumentCount includes arguments that may be omitted, but have defaults, such as String.prototype.slice(s, e), where if e is omitted, the string's length is used. | For example, the Function object that is the initial value of the | slice property of the String prototype object is described under | the subclause heading “String.prototype.slice (start, end)” which | shows the two named arguments start and end; therefore the | value of the length property of that Function object is 2. Then again, String.prototype.indexOf (searchString, position)'s length is 1; If position is undefined, 0 is assumed. According to the explanation in the spec, it should be 2. WebIDL defines "optional" formally in one place which seems like a good idea. -- Garrett Twitter: @xkit personx.tumblr.com
Received on Monday, 26 August 2013 17:05:34 UTC