async | Async utilities for node and the browser | Reactive Programming library
kandi X-RAY | async Summary
kandi X-RAY | async Summary
Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. Although originally designed for use with Node.js and installable via npm i async, it can also be used directly in the browser. A ESM/MJS version is included in the main async package that should automatically be used with compatible bundlers such as Webpack and Rollup. A pure ESM version of Async is available as async-es. For Documentation, visit
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Top functions reviewed by kandi - BETA
- Executes a set of tasks in parallel
- Queue task queue
- Creates a new benchmark object
- Async iterator function .
- Retry a task
- loop for each element
- Pushes task queue
- Injects the passed functions into an array of functions that are passed to the callback function .
- build member navigation
- Insert new data into the queue
async Key Features
async Examples and Code Snippets
Lines of Code : 21License : Non-SPDX (Apache License 2.0)
Copydef async_clear_error():
"""Clear pending operations and error statuses in async execution.
In async execution mode, an error in op/function execution can lead to errors
in subsequent ops/functions that are scheduled but not yet executed. Call def async_wait():
"""Sync all async operations and raise any errors during execution.
In async execution mode, an op/function call can return before finishing the
actual execution. Calling this method creates a synchronization barrier for
al def is_async():
"""Returns true if current thread is in async mode."""
return context().is_async() Community Discussions
Trending Discussions on async
QUESTION
I have updated node today and I'm getting this error:
ANSWER
Answered 2021-Oct-27 at 17:19Ran into the same issue with Node.js 17.0.0. To solve it, I downgraded to version 14.18.1, deleted node_modules and reinstalled.
QUESTION
After cloning the repository I created and set my .env.local file, ran npm i then ran npm run dev. The server starts, env is loaded from .env.local however it immediately fails prompting me with the following:
ANSWER
Answered 2021-Oct-30 at 20:21I solved this by upgrading to the latest version of nodeJS
QUESTION
I've built my React Native app and tested and troubleshooted with my iOS devices for months. Now I'm trying to built and test the app on Android for the first time. The thing is, that I keep getting errors trying to run the Android-version of my app. After hours of debugging and troubleshooting, I tried to create a new RN project and see if that could run on my emulator and device. I got that part working and then I wanted to copy/paste the files of my existing app project into the new project.
I pasted my existing assets, styles, the source JS-files and the package.json file into the new project, ran npm install and then I ended up with the exact same error message as I had in the original project when I run react-native run-android.
The full error message is here:
...ANSWER
Answered 2021-Aug-21 at 13:43I've hit this same issue and have temporarily resolved it by uninstalling react-native-video (npm uninstall --save react-native-video). That's not a great answer as I need that component, but I don't have a full solution yet. I think somehow com.yqritc:android-scalablevideoview:1.0.4. is required by react-native-video but has gotten lost or removed. Other thoughts are welcome.
UPDATE: Resolved! In your build.gradle in your Android folder you need to add the repository "jcenter()" in allprojects (not in build dependencies) like this...
QUESTION
I have been using the #[tokio::main] macro in one of my programs. After importing main and using it unqualified, I encountered an unexpected error.
ANSWER
Answered 2022-Feb-15 at 23:57#[main] is an old, unstable attribute that was mostly removed from the language in 1.53.0. However, the removal missed one line, with the result you see: the attribute had no effect, but it could be used on stable Rust without an error, and conflicted with imported attributes named main. This was a bug, not intended behaviour. It has been fixed as of nightly-2022-02-10 and 1.59.0-beta.8. Your example with use tokio::main; and #[main] can now run without error.
Before it was removed, the unstable #[main] was used to specify the entry point of a program. Alex Crichton described the behaviour of it and related attributes in a 2016 comment on GitHub:
Ah yes, we've got three entry points. I.. think this is how they work:
- First,
#[start], the receiver ofint argcandchar **argv. This is literally the symbolmain(or what is called by that symbol generated in the compiler).- Next, there's
#[lang = "start"]. If no#[start]exists in the crate graph then the compiler generates amainfunction that calls this. This functions receives argc/argv along with a third argument that is a function pointer to the#[main]function (defined below). Importantly,#[lang = "start"]can be located in a library. For example it's located in the standard library (libstd).- Finally,
#[main], the main function for an executable. This is passed no arguments and is called by#[lang = "start"](if it decides to). The standard library uses this to initialize itself and then call the Rust program. This, if not specified, defaults tofn mainat the top.So to answer your question, this isn't the same as
#[start]. To answer your other (possibly not yet asked) question, yes we have too many entry points.
QUESTION
I'm trying to make a Discord bot that just says if someone is online on the game.
However I keep getting this message:
[ERR_REQUIRE_ESM]: require() of ES Module from not supported. Instead change the require of index.js in... to a dynamic import() which is available in all CommonJS modules.
This is my code:
...ANSWER
Answered 2021-Sep-07 at 06:38node-fetch v3 recently stopped support for the require way of importing it in favor of ES Modules. You'll need to use ESM imports now, like:
QUESTION
In WWDC 2021 video, Protect mutable state with Swift actors, they provide the following code snippet:
...ANSWER
Answered 2022-Jan-05 at 00:30The key is to keep a reference to the Task, and if found, await its value.
Perhaps:
QUESTION
I'm learning about different memory orders.
I have this code, which works and passes GCC's and Clang's thread sanitizers:
...ANSWER
Answered 2022-Jan-04 at 16:06The thread sanitizer currently doesn't support std::atomic_thread_fence. (GCC and Clang use the same thread sanitizer, so it applies to both.)
GCC 12 (currently trunk) warns about it:
QUESTION
I am trying to try a sample project in Flutter integration email and google based login, and planning to use firebase initialisation for doing it while I have followed all the steps as mentioned in tutorials I am getting this error as soon as firebase is attempted to be initialised.
...ANSWER
Answered 2021-Dec-25 at 09:13UPDATE:
For your firebase_core version is seems to be sufficient to pass the FirebaseOptions once you initialize firebase in your flutter code (and you don't need any script tags in your index.html):
QUESTION
My problem is that I'm trying to handle the value of my inputs, which the user defines which input he wants, by an API call.
Here is where I get the values :
...ANSWER
Answered 2021-Dec-10 at 13:32It was a bit hacky so I simplified it, I think you should understand the logic behind it.
QUESTION
I am working on a "heartbeat" application that pings hundreds of IP addresses every minute via a loop. The IP addresses are stored in a list of a class Machines. I have a loop that creates a Task (where MachinePingResults is basically a Tuple of an IP and online status) for each IP and calls a ping function using System.Net.NetworkInformation.
The issue I'm having is that after hours (or days) of running, one of the loops of the main program fails to finish the Tasks which is leading to a memory leak. I cannot determine why my Tasks are not finishing (if I look in the Task list during runtime after a few days of running, there are hundreds of tasks that appear as "awaiting"). Most of the time all the tasks finish and are disposed; it is just randomly that they don't finish. For example, the past 24 hours had one issue at about 12 hours in with 148 awaiting tasks that never finished. Due to the nature of not being able to see why the Ping is hanging (since it's internal to .NET), I haven't been able to replicate the issue to debug.
(It appears that the Ping call in .NET can hang and the built-in timeout fail if there is a DNS issue, which is why I built an additional timeout in)
I have a way to cancel the main loop if the pings don't return within 15 seconds using Task.Delay and a CancellationToken. Then in each Ping function I have a Delay in case the Ping call itself hangs that forces the function to complete. Also note I am only pinging IPv4; there is no IPv6 or URL.
Main Loop
...ANSWER
Answered 2021-Nov-26 at 08:37There are quite a few gaps in the code posted, but I attempted to replicate and in doing so ended up refactoring a bit.
This version seems pretty robust, with the actual call to SendAsync wrapped in an adapter class.
I accept this doesn't necessarily answer the question directly, but in the absence of being able to replicate your problem exactly, offers an alternative way of structuring the code that may eliminate the problem.
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