Jeff Walden:
Check out the ES5 erratum -- steps 5 and 7 have been removed.
http://wiki.ecmascript.org/doku.php
Thank you for the link, but I have some question about this. Now I can
pass array like object with strange length property and this is not
cause an Error. For example:
length = -1;
The aim has been consistency. All Array generic own methods that explicitly
use the length property have the same behavior:
- Let lenVal be the result of calling the [[Get]] internal method of O with
argument length.
- Let len be ToUint32(lenVal).
Function.prototype.apply now behave the same
In ES5-15.4 is clearly defined what is an index and what conditions must
verify length
A property name P (in the form of a String value) is an array index if and
only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to
2^32-1
Every Array object has a length property whose
-boun...@mozilla.org [mailto:es-discuss-boun...@mozilla.org] On
Behalf Of Jose Antonio Perez
Sent: Thursday, October 28, 2010 8:41 AM
To: Asen Bozhilov
Cc: es-discuss
Subject: Re: 15.3.4.3 Function.prototype.apply (thisArg, argArray)
In ES5-15.4 is clearly defined what is an index and what
ES5 does some changes in Function.prototype.apply. It allows generic
array-like object for a second argument of `apply' method.
| 6. Let n be ToUint32(len).
| 7. If n is not equal to ToNumber(len), then throw a TypeError exception.
Isn't better to throws a RangeError instead of TypeError? Is
Check out the ES5 erratum -- steps 5 and 7 have been removed.
http://wiki.ecmascript.org/doku.php
Jeff
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