On Thu, Aug 21, 2008 at 9:08 PM, Sam Ruby <[EMAIL PROTECTED]> wrote: > Waldemar Horwat wrote: >> - We should not print the trailing zeroes. IEEE P754 does not >> require it, and it breaks things such as array lookup. There is >> precedence for this in ECMAScript: -0 and +0 both print as "0". If >> someone really wants to distinguish among equal numbers, he can do it >> with a function call to one of the mandated functions. > > Please explain the breakage?
In ES3, an expression like a[b] calculates ToObject(a) and ToString(b), then performs the property lookup. Thus arr[0] and arr["0"] are identical in meaning. http://bclary.com/2004/11/07/#a-11.2.1 Assuming we retain this rule and add decimal numbers, a question arises as to how this code should behave: var a = []; a[0] = "first"; a[0.0m] = "second"; // a second property? a[0.000m] = "third"; // a third? The question applies to all objects, not just Arrays. I think this is a tricky question; neither answer is obviously right to me. -j _______________________________________________ Es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
