On 11/1/2019 2:42 PM, Jan-Ivar Bruaroey wrote:
My original point was that the semantics of Promise.allSettled, which
are "keep waiting for the lot even if some async operations fail", did
not deserve its own standard name in the JS language, because of
A) how rarely this is actually what you w
On Thu, Oct 31, 2019, 06:02 Jason Orendorff wrote:
> Ignoring the awaited value here is like using `catch {}` to squelch all
> exceptions, or ignoring the return value of an async function or method, or
> any other expression that produces a Promise. Do we have lints for those
> pitfalls? I'm kin
On 11/1/19 6:08 AM, Paolo Amadini wrote:
On 10/31/2019 1:57 PM, Jan-Ivar Bruaroey wrote:
The context here is the same as Promise.allSettled: we explicitly *do*
want to ignore errors, right?
In general, in mozilla-central we want to at least log those errors, at
which point they are already cau
On 10/31/2019 1:57 PM, Jan-Ivar Bruaroey wrote:
The context here is the same as Promise.allSettled: we explicitly *do*
want to ignore errors, right?
In general, in mozilla-central we want to at least log those errors, at
which point they are already caught, and using "Promise.all" is then
equiv
On 10/31/19 4:26 AM, Paolo Amadini wrote:
On 10/30/2019 10:19 PM, Jan-Ivar Bruaroey wrote:
Promise.all(promises.map(p => p.catch(e => e)))
https://stackoverflow.com/questions/31424561/wait-until-all-promises-complete-even-if-some-rejected/36115549#36115549
By the way, this "catch(e => e
On Thu, Oct 31, 2019 at 4:10 AM Paolo Amadini
wrote:
>// INCORRECT
>//await Promise.allSettled([promise1, promise2]);
>
> The last example silently loses any rejection state.
>
Ignoring the awaited value here is like using `catch {}` to squelch all
exceptions, or ignoring the return valu
On 10/30/2019 10:19 PM, Jan-Ivar Bruaroey wrote:
Promise.all(promises.map(p => p.catch(e => e)))
https://stackoverflow.com/questions/31424561/wait-until-all-promises-complete-even-if-some-rejected/36115549#36115549
By the way, this "catch(e => e)" call may make sense as an example in
the
On 10/30/2019 10:19 PM, Jan-Ivar Bruaroey wrote:
This always seemed trivial to me to do with:
Promise.all(promises.map(p => p.catch(e => e)))
As Boris pointed out, this does not have proper exception handling. If
exceptions should be ignored, it may be good to call "console.error". In
case
Promise.any is an inverse of Promise.all, right? There and back again:
Promise.all(promises.map(p => p.then(r => Promise.reject(r), e => e)))
.then(r => Promise.reject(r), e => e)
https://jsfiddle.net/jib1/f085bcyk/
That said, Promise.any has a nice ring to it.
.: Jan-Ivar :.
On 10/30/19 6:
Yes, it would have been clever of me to predict the semantics 3 years
ago. ;-)
But as I mention in the stackoverflow post, depending on context and the
type(s) of values expected, errors can often be distinguished easily
enough in practice, if not in general.
That said, I've never actually h
On 10/30/19 6:19 PM, Jan-Ivar Bruaroey wrote:
This always seemed trivial to me to do with:
Promise.all(promises.map(p => p.catch(e => e)))
This has different semantics from Promise.allSettled, right? In
particular, it effectively treats rejected promises as resolved with the
rejection
On Wed, Oct 30, 2019 at 5:20 PM Jan-Ivar Bruaroey wrote:
> This always seemed trivial to me to do with:
>
> Promise.all(promises.map(p => p.catch(e => e)))
>
I guess it depends on your definition of "trivial". If everyone knows de
Morgan's laws, we don't need *both* `||` and `&&` operators.
Every new primitive is a nail in the coffin of the next attempt to build a
new competitive web browser.
(Distraught voice: "Won't they think of the Servos?!?")
On Wed, Oct 30, 2019 at 3:20 PM Jan-Ivar Bruaroey wrote:
> This always seemed trivial to me to do with:
>
> Promise.all(promises.m
This always seemed trivial to me to do with:
Promise.all(promises.map(p => p.catch(e => e)))
https://stackoverflow.com/questions/31424561/wait-until-all-promises-complete-even-if-some-rejected/36115549#36115549
But I guess it's too late to make that point. I guess the more
primitives the m
In Firefox 71, we'll ship Promise.allSettled, a standard way to `await`
several promises at once. André Bargull [:anba] contributed the
implementation of this feature. It's in Nightly now.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1539694
Shipped in: https://bugzilla.mozilla.org/show_bug.c
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