Array#splice sparse array spec question.
Can someone confirm/reject that by spec (http://es5.github.com/#x15.4.4.12): // sparse array ;D var a=[0]; a[2]=2; // the resulting arrays length should be 1 and not 2 console.log(a.splice(0, 2).length); I'm seeing `2` in latest Chrome/FF. Thanks, -JDD ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
Re: Array#splice sparse array spec question.
This is a spec. bug. Immediately before line10 of the algorithm there should be a line that says: Call the [[Put]] internal method of A with arguments length, actualDeleteCount, and true. The ES3 spec. has the equivalent of the above line. It was apparently inadvertently dropped in the ES5 spec. Chrome's behavior (and also Firefox, I haven't checked others) matches the intended ES3 behavior. I'll file a bug against the the ES5 spec. Allen Chrome is correct On Apr 9, 2012, at 8:19 AM, John-David Dalton wrote: Can someone confirm/reject that by spec (http://es5.github.com/#x15.4.4.12): // sparse array ;D var a=[0]; a[2]=2; // the resulting arrays length should be 1 and not 2 console.log(a.splice(0, 2).length); I'm seeing `2` in latest Chrome/FF. Thanks, -JDD ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
Re: Array#splice sparse array spec question.
now https://bugs.ecmascript.org/show_bug.cgi?id=332 On Apr 9, 2012, at 8:51 AM, Allen Wirfs-Brock wrote: This is a spec. bug. Immediately before line10 of the algorithm there should be a line that says: Call the [[Put]] internal method of A with arguments length, actualDeleteCount, and true. The ES3 spec. has the equivalent of the above line. It was apparently inadvertently dropped in the ES5 spec. Chrome's behavior (and also Firefox, I haven't checked others) matches the intended ES3 behavior. I'll file a bug against the the ES5 spec. Allen Chrome is correct On Apr 9, 2012, at 8:19 AM, John-David Dalton wrote: Can someone confirm/reject that by spec (http://es5.github.com/#x15.4.4.12): // sparse array ;D var a=[0]; a[2]=2; // the resulting arrays length should be 1 and not 2 console.log(a.splice(0, 2).length); I'm seeing `2` in latest Chrome/FF. Thanks, -JDD ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
