Gary is right: `let` is disabled for web content in Firefox because our
version isn't spec-compatible enough yet. In the shell or chrome code,
where it is enabled, our behavior matches traceur's in that we treat the
given examples as errors, too.
On Fri, Jan 2, 2015 at 4:40 PM, Gary Guo
Thanks for your note, I'm not testing it under Nightly. Did you test that the
'let' declaration is working properly in JSFiddle? It may not be enabled in web
pages by default if the script doesn't declare to be javascript 1.7.
From: waldron.r...@gmail.com
Date: Fri, 2 Jan 2015 14:23:31 +
On Thu Jan 01 2015 at 9:47:47 PM Gary Guo nbdd0...@hotmail.com wrote:
It seems that in JSFiddle running on Firefox, let declaration is disabled.
So this cannot explain.
I don't know why you'd say that, considering the fiddle works just fine.
Open your developer console and you'll see the
On Jan 2, 2015, at 9:18 AM, Michał Wadas wrote:
What is reason behind restricting entries in global symbol registry to
be indexed only by strings?
What are the use cases for anything other strings?
Allen
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What is reason behind restricting entries in global symbol registry to
be indexed only by strings?
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I think there are a few reasons why you wouldn't want these.
First and foremost, octal escapes (\nnn) are just an alternative
equivalent to hex escapes (\xnn). Most software developers spend a lot
more time dealing with hex when it comes to byte values, and very
little time with octal literals
One reason it might make sense to throw, is people converting values to string
names for use as object properties. Reason you'd want to throw would be to
prevent accidentally making the key useless (different from its original Symbol
value).
Haven't paid attention to the rationale, but that
On Fri Jan 02 2015 at 7:53:22 PM Brendan Eich bren...@mozilla.org wrote:
Caitlin Potter wrote:
One reason it might make sense to throw, is people converting values
to string names for use as object properties. Reason you'd want to
throw would be to prevent accidentally making the key
Hi,
Current web browsers implement octal escape sequences of the form \52,
representing the character of code 0o52, in string literals in sloppy mode
only, and in regexps (at the condition there is less than 52 capturing groups)
in both sloppy and strict mode.
(In order to avoid confusion: I
Le 2 janv. 2015 à 22:08, Caitlin Potter caitpotte...@gmail.com a écrit :
(...)
More important, octal escape sequences are a bit liberal, in that they
can be of several lengths, with a pretty wide range of delimiters.
This, I think, results in many cases where octal escape sequences are
One reason it might make sense to throw, is people converting values to
string names for use as object properties. Reason you'd want to throw would
be to prevent accidentally making the key useless (different from its
original Symbol value).
This is exactly the reason.
Of course,
Kyle Simpson brought this up on Twitter today and I think it deserves one
last look. Here's an example of the issue:
var sym = Symbol(description);
sym + ; // Throws
Meanwhile...
var sym = Symbol(description);
String(sym); // Symbol(description) *
(* appears to be the convention that
Caitlin Potter wrote:
One reason it might make sense to throw, is people converting values
to string names for use as object properties. Reason you'd want to
throw would be to prevent accidentally making the key useless
(different from its original Symbol value).
This is exactly the reason.
On 1/2/15 9:33 PM, Axel Rauschmayer wrote:
Do people ever
compose a property key for an object out of several pieces?
On the web? All the time.
-Boris
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On 1/2/15 9:40 PM, Axel Rauschmayer wrote:
Can you give an example?
get: function( num ) {
return num != null ?
// Return just the one element from the set
( num 0 ? this[ num + this.length ] : this[ num ] ) :
Why not? Symbol's [[Description]] internal slot is string
Date: Fri, 2 Jan 2015 18:18:55 +0100
Subject: Why does Symbol.for and Symbol.keyFor are limited to strings?
From: michalwa...@gmail.com
To: es-discuss@mozilla.org
What is reason behind restricting entries in global symbol registry
Can you give an example?
On 03 Jan 2015, at 03:34, Boris Zbarsky bzbar...@mit.edu wrote:
On 1/2/15 9:33 PM, Axel Rauschmayer wrote:
Do people ever
compose a property key for an object out of several pieces?
On the web? All the time.
-Boris
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