It'd be great if there was material on the limits of the JVM and the CLR.
AFAICT these are the only virtual machines that are trying to be universal (run
both static and dynamic languages well).
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, but unfortunately won’t work.
Somehow, we have to put the burden on `with` and the legacy code instead of the
future-facing parts of the language.
Axel
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?
Thanks!
Axel
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On 30 Apr 2014, at 21:17 , Boris Zbarsky bzbar...@mit.edu wrote:
On 4/30/14, 2:49 PM, Axel Rauschmayer wrote:
So Element.prototype is in the variable scope chain of event handlers? Wow.
Is this documented somewhere?
You mean other than in the spec? See
http://www.whatwg.org/specs/web
can’t seem to find it in Caja.
Thanks!
Axel
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, i'm just very
interested in finding out what practical task they are meant to accomplish
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. You could also reorder the pieces. A bit of work for a library, but
template strings would help, a little.
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http://wiki.ecmascript.org/doku.php?id=harmony:modules_standard
Is this the most current document on the standard modules?
Thanks!
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in a
separate @reflect module.
Regards,
Tom
2014/1/19 Axel Rauschmayer a...@rauschma.de
http://wiki.ecmascript.org/doku.php?id=harmony:modules_standard
Is this the most current document on the standard modules?
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Given that all upcoming value object constructors will start with lowercase
letters, shouldn’t Symbol, too?
Axel
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are unique
* Only exposed via Object.getOwnPropertySymbols instead of
Object.getOwnPropertyKeys
* |Object.mixin| copies both symbol and string properties
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(a, b) {
return point2d(a + b.x, a + b.y);
}
```
Or, possibly:
```
function + (a :: number, b :: point2d) {
return point2d(a + b.x, a + b.y);
}
```
Axel
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structures. After deserialising it with
`JSON.parse`, I just have to recursively reconstruct the `_parent`
back-references;
* etc.
Nice example. Data versus meta-data, in line with the `length` of an array
being non-enumerable.
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on: The
answers and discussions on this mailing list were essential in helping me
understand the language.
Axel
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cut
out for you, anyway. I’m thinking more along the lines along a companion
document. But NOTEs are a great idea, I’ll keep it in mind while reading the
spec.
Axel
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http://www.slideshare.net/BrendanEich/value-objects
One thing is not entirely clear from the slides: Will developers be able to
define their own value object types? Without that feature I don’t see how
overloading operators would be very interesting.
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Axel
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explanation of what enumerability will be, going
forward. If there isn’t one then I’d argue that no new feature should be
influenced by it.
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the design of ECMAScript going forward if we had a
definitive and complete explanation of what enumerability is now and what it
should be in the future. I’m trying to make sense of it and to explain it to
others and continue to fail.
Axel
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if it didn’t
distinguish +0 and -0?
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Offhand, ID instead of key, but that is awfully generic. It may make sense to
invent a new term.
On Dec 22, 2013, at 6:53 , Mark S. Miller erig...@google.com wrote:
Suggestions?
On Sat, Dec 21, 2013 at 9:48 PM, Axel Rauschmayer a...@rauschma.de wrote:
One problem with that method name
()`?
Axel
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code I could compile to for roughly the same semantics, that
would be helpful.
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then there is only a
single kind of function definition.
Axel
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: defer default export sugarings until ES7, when we can use data
gathered from experience with ES6 modules to guide syntax additions.
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for truthy/falsy tests? In loops (for-of, while), I
find this kind of thing useful, for if-then-else, much less so.
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Source: David Herman,
https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-11/nov-20.md
Can someone elaborate? I don’t see an alternative.
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#410-generator-arrow-function-syntax
Thanks!
Axel
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Thanks! But I don’t see `function!`, anywhere.
On Nov 28, 2013, at 16:10 , Mark S. Miller erig...@google.com wrote:
http://wiki.ecmascript.org/doku.php?id=strawman:async_functions
cheers, MarkM
On Nov 28, 2013 12:34 AM, Axel Rauschmayer a...@rauschma.de wrote:
In the most recent meeting
notes, too?
Thanks!
Axel
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mode).
```js
(function () { 'use strict'; var s=''; s.foo=3 }());
```
But it doesn’t (not on Firefox and V8).
[1] http://ecma-international.org/ecma-262/5.1/#sec-8.7.2
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It does indeed. I just checked in Safari and got an exception.
Thanks,
Axel
On Nov 23, 2013, at 11:00 , Yusuke SUZUKI utatane@gmail.com wrote:
JavaScriptCore implements it correctly.
---
Regards,
Yusuke Suzuki
On Sat, Nov 23, 2013 at 6:24 PM, Axel Rauschmayer a...@rauschma.de
, Axel Rauschmayer a...@rauschma.de wrote:
It does indeed. I just checked in Safari and got an exception.
Thanks,
Axel
On Nov 23, 2013, at 11:00 , Yusuke SUZUKI utatane@gmail.com wrote:
JavaScriptCore implements it correctly.
---
Regards,
Yusuke Suzuki
On Sat, Nov 23, 2013 at 6
Not sure it matters, but: table 15 is incomplete. Four trues are missing.
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Well, strike that. I misunderstood what the operation does. Sorry.
On Nov 22, 2013, at 21:36 , Axel Rauschmayer a...@rauschma.de wrote:
Not sure it matters, but: table 15 is incomplete. Four trues are missing.
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In the ES5 spec PDF, there were convenient links from the ToC to the content.
In the ES5.1 spec, they are gone. Is there a way to bring them back?
Thanks!
Axel
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(for bundling)? Is there a way to combine module IDs and packages?
Thanks!
Axel
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.)
Axel
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Caveat: with yield*, you want generators to be more like functions than like
blocks.
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On 16.11.2013, at 10:28, Claus Reinke claus.rei
();
yield sleep(2000);
status.fadeOut();
});
```
[Example taken from task.js website.]
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that. Thought it was *=. I don’t mind either way, my (admittedly
weak) mnemonic would be “asterisk after function-defining token”.
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:
ActualArgumentCount : '#' BindingIdentifier
So, the declaration for splice could then be:
function splice(start, deleteCount, ...items, #argCount) {
...
if (argCount == 0) {...
Thoughts?
Allen
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at 5:36 AM, Axel Rauschmayer a...@rauschma.de wrote:
What is the best way to create top-level scopes in ES6?
I guess I am probably missing something important, but I thought you
could just write a block and use `let` in it:
{
let foo = ...;
...
}
even in sloppy mode
/NodeJS could easily take over the
technical and statistical computing domains.
Tristan
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Another reason: you can’t have empty generators without marking them in some
manner.
On Sat, Oct 26, 2013 at 1:01 PM, Lucio Tato luciot...@gmail.com wrote:
It's really needed to make js syntax more complex in order to implement
generators?
It's function* really needed?
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).
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that is neither #1 nor #2.
Axel
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to be available in both sloppy and strict mode
(right?). That seems like a pretty good solution (I also would have been OK
with only having ES6 features in strict mode).
Thanks!
Axel
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:
```js
function getRandomInteger(lower = 0, upper) {
return Math.floor(Math.random() * (upper - lower)) + lower;
}
```
Implementing this function in some other manner is much more complicated.
But I agree that you want to name parameters if there are more than 2.
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case for this, I’d find it confusing.
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The problem is that you have to bite the bullet of syntactic inconvenience for
either default imports or normal imports. I’d prefer the syntax you suggested,
but there seem to be many people who want to make default imports as simple as
possible.
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[Sent from
and then load modules conditionally? But
that seems like a more complicated solution. I’m not even sure how I would
implement the detection part.
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matches (group 0) are returned.
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()
– execIter()
`execAll()` may not be that bad. It’s not pretty, but it’s fairly easy to guess
what it does (*if* one know what the normal `exec()` does).
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:45 , Brendan Eich bren...@mozilla.com wrote:
Axel Rauschmayer wrote:
The fact that s.match(/re/g) returns the array of all matches (with
captures) sucks some of the oxygen away from any /re/g.execAll(s) proposal.
But String.prototype.match has perlish hair (e.g., those capture groups
Quick, possibly silly idea: What if `typeof null` returned `undefined`?
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) for that?
There will be a public symbol (that you can import from a system module) that
will allow you to do both things.
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/.execMultipleLazy('str') ]
```
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in iteratables?
It would be lovely to have a module with tool functions for this, similar to
Python’s itertools.
http://docs.python.org/3/library/itertools.html
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Suggestion: a named parameter `ignoreCase`:
$ 'hello world'.contains('WORLD')
false
$ 'hello world'.contains('WORLD', { ignoreCase: true })
true
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parens, braces and
brackets.
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Well, obviously it doesn’t make much sense to do that for `text()`, but it
would be great to have for `exec()`.
On Aug 24, 2013, at 21:39 , Axel Rauschmayer a...@rauschma.de wrote:
At the moment, the following two methods abuse regular expressions as
iterators (if the /g flag is set
An example to make things clearer (thanks for the suggestion, Domenic):
https://gist.github.com/rauschma/6330265
On Aug 24, 2013, at 21:43 , Axel Rauschmayer a...@rauschma.de wrote:
Well, obviously it doesn’t make much sense to do that for `text()`, but it
would be great to have for `exec
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to declaratively specify a minimum arity).
Then destructuring assignment and parameter handling would work very similarly.
function bla(!mandatoryArg, optionalArg1, optionalArg2 = 123) {
...
}
Axel
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becomes:
let { +a: foo, b: bar } = { a: 1 }; // foo = 1, b = undefined
let { +a: foo, b: bar } = { }; // exception
function bla(+mandatoryArg, optionalArg1, optionalArg2 = 123) {
...
}
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; // re-exporting specified
exports from another module
That seems redundant. Maybe one could mark things that should be re-exported
when importing them? On the other hand, this may be rare enough that it doesn’t
warrant the extra syntax.
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home
the option open of adding complete multiple dispatch later (or
via a library).
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the need for a standard :-)
Array.prototype.first could work too.
David
[1] https://twitter.com/angustweets/status/359827047117373443
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an event listener with the current loader, but haven’t found
anything in the loader API.
Axel
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welcome (cc'ing Allen since he is realm-master; ES1-5 left
realm implicit and singular, contrary to reality in browsers).
/be
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and multiple dispatch to
implement the DCI ideas):
http://www.artima.com/articles/dci_vision.html
On Jul 29, 2013, at 0:41 , Brendan Eich bren...@mozilla.com wrote:
Axel Rauschmayer wrote:
Suggestion: put this evolving spec into a Gist or something similar.
Definitely -- trying not to work all
for working with data (web services, JSON, etc.), where you
don’t want to (or can’t) encapsulate behavior with data. Design-wise, they make
functions aware of object-orientation so that you can use them to implement
algorithms that span multiple classes (as binary operators do).
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-discuss
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= =) {
// ...
}
```
From: Axel Rauschmayer
Sent: 7/28/2013 0:40
To: Brandon Benvie
Cc: es-discuss@mozilla.org
Subject: Re: More concise arrow functions
+1
My perspective: I don’t see a use case for a missing body, but a missing
parameter list would be very useful – to delay the execution of a block
solve the main use
cases.
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to export anything but the constructor function from each module.
- Ryan
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frequent use case I’ve encountered: does the value have a prototype
(i.e., will Object.getPrototypeOf() work)?
I’m assuming that value objects will have a prototype, accessible via
Object.getPrototypeOf (?)
Axel
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that bracketing noise in syntax.
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be `thisValue`.
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functions, right?
Thanks!
Axel
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forgive brevity and typos.]]]
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and Array.of for an example of this in action.
Similarly: @@create (which enables the subtyping of built-ins).
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, a (sub)class is the
implementation of a (sub)type.
Axel
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(Underscore etc.). With ES6, “subclassing” works, because there are
classes, but I wouldn’t want to use it for ES5.
Suggestions for a better word are welcome.
Axel
On Jul 1, 2013, at 19:34 , Andreas Rossberg rossb...@google.com wrote:
On 1 July 2013 19:00, Axel Rauschmayer a...@rauschma.de
will improve (partially helped by classes).
Additionally, unit tests minimize the risks of refactoring.
Axel
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coupling
between child and parents, and much more easily provide for selective
inheritance (I only want the banana, not the gorilla, banana, and entire
jungle).
- Eric
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the consensus for
ECMAScript 6 classes (lots of incredibly long, incredibly passionate
discussions!). Would I have done classes differently? Yes. But the consensus
enables us to have a solution that is good enough, which (IMO) is far better
than having nothing.
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function
would even be useful: a generator with lexical `this`.
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arrow
function would even be useful: a generator with lexical `this`.
see https://bugs.ecmascript.org/show_bug.cgi?id=1489
Perfect. That’s how I thought it would work.
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need a consistent story for ES6 in this area.
Axel
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,source=0,
count=this.length-source)
Is the case of moving trailing elements somewhere else very common? If not,
then I’d define the parameters in this order: source, count, target.
Rationale: easier to memorize.
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,%20int,%20java.lang.Object,%20int,%20int%29
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Thanks to proxies now having a separate trap for “invoke”, we can automatically
bind methods on “get”. I’ve written down my thoughts here:
http://www.2ality.com/2013/06/auto-binding.html
Axel
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blog
-and-an-iterable
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