Async | Async , await control flow for Swift | Reactive Programming library
kandi X-RAY | Async Summary
kandi X-RAY | Async Summary
Async, await control flow for Swift.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Async
Async Key Features
Async Examples and Code Snippets
Lines of Code : 50License : Permissive (MIT)
Copylet createImage = async {() -> UIImage in
sleep(3)
return UIImage()
}
createImage() {image in
// do something with the image
}
let fetchImage = {(URL: NSURL) in
async {() -> UIImage in
// fetch the image synchronously
async {
// blocks the thread until callback is called
let message = await {(callback: (String -> Void)) in
sleep(1)
callback("Hello")
}
print(message) // "Hello"
}() {}
// equivalent to
async {
let message = aw // example credit to: http://promisekit.org/chaining
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
let md5 = md5ForData(data)
dispatch_async(dispatch_get_main_queue()) {
self.label.text = md5
def 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 am running the following in my React app and when I open the console in Chrome, it is printing the response.data[0] twice in the console. What is causing this?
...ANSWER
Answered 2021-Jun-16 at 02:48You have included fetching function in the component as it is, so it fires every time component being rendered. You better to include fetching data in useEffect hook just like this:
QUESTION
I'm trying to understand how parallelization works in Durable Function. I have a durable function with the following code:
...ANSWER
Answered 2021-Jun-10 at 08:44There are two approaches that are possible. The first is to use a suborchestrator for each job so that each suborchestrator handles just a specific job. Here is the docs for this approach https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-sub-orchestrations?tabs=csharp Example from docs seem to be alike to yours.
The other is to use ContinueWith so that each job has its own "chain"
QUESTION
Giving a bit of context. I'm using c++17. I'm using pointer T* data because this will interop with cuda code. I'm trying write a parallel version (on CPU) of a histogram creator. The sequential version:
ANSWER
Answered 2021-Jun-16 at 00:46The issue you are having has nothing to do with templates. You cannot invoke std::async() on a member function without binding it to an instance. Wrapping the call in a lambda does the trick.
Here's an example:
QUESTION
I've ran into problem getting UI lags when this line is running:
...ANSWER
Answered 2021-Jun-16 at 00:29I don't believe you can use SharedPreferences within an Isolate without support for MethodChannel / accessing platform-specific underlying OS frameworks on iOS / Android.
You would need to use FlutterIsolate or a similar package to provide that support.
chunhunghan has a good answer detailing this.
Alternatively, you could run the crypt.generateKeys() by itself in your Isolate.spawn() call and use the results after in a separate method accessing SharedPreferences. (Assuming that crypt package is also not relying on platform-specific code.)
QUESTION
I have the wackiest bug. Like....the wackiest! If any of ya'll want to put eyes on this, awesomesauce! I really appriciate it! I am creating a survey with REACT, Redux, SQL, HML, Material-ui, and CSS.
I've created a graph of information with am4charts using data from a database. Everything is working and will show up on the page......but not on page load. What I am seeing in my console is that the page will load, it fires off my get request but doesn't return with the data fast enough (I think). By the time that the get request loads, my graph has populated with no data.
Here is the code that I have for the page that I am rendering. What is really odd is that, once my code has run, I can cut a line of code (I've been using a console log). And then the graph will render and load.
...ANSWER
Answered 2021-Jun-15 at 22:40Can you try this fix? I created new functions for some tasks.
https://codesandbox.io/s/vigorous-varahamihira-6j588?file=/src/App.js
QUESTION
How do I get the URL of the current tab in the background service worker in MV3?
Here's what I have:
...ANSWER
Answered 2021-Jun-15 at 21:40You function getTab seems not right, you are currently trying to query on the url. Not on the query options. The following function should work.
QUESTION
I'm using NGXS to implement the state management in my Angular project, and the states are updated by the WebSocket, a plugin of NGXS
What I implemented:
model.ts
...ANSWER
Answered 2021-Jun-15 at 20:47Try using a state operator to update the state. For example, you could use the updateItem to find and update an item in an array:
QUESTION
I am doing a post request which is correct (I have proven it in the pic below), yet MVC is not mapping it to my model, even though Newtonsoft.Json class is able to map my post data to the same data model without issue. How do I debug this further?
Data to replicate the issue (just tested it and the issue is still present):
Model:
...ANSWER
Answered 2021-Jun-15 at 20:26fix your ajax
QUESTION
I sort of need help here, honestly not sure where I went wrong, here is the full code. I am sort of new, just trying to bring back the mention user and the reason back in a message instead of doing anything with this information.
...ANSWER
Answered 2021-Jun-15 at 17:58Why are you calling client in a command file if you already started a new instance of a client in your root file? try removing client from the top of the code. Hope that works
QUESTION
I am new to rust and I was reading up on using futures and async / await in rust, and built a simple tcp server using it. I then decided to write a quick benchmark, by sending requests to the server at a constant rate, but I am having some strange issues.
The below code should send a request every 0.001 seconds, and it does, except the program reports strange run times. This is the output:
...ANSWER
Answered 2021-Jun-15 at 20:06You are not measuring the elapsed time correctly:
total_send_timemeasures the duration of thespawn()call, but as the actual task is executed asynchronously,start_in.elapsed()does not give you any information about how much time the task actually takes.The
ran intime, as measured bystart.elapsed()is also not useful at all. As you are using blocking sleep operation, you are just measuring how much time your app has spent in thestd::thread::sleep()Last but not least, your
time_to_sleepcalculation is completely incorrect, because of the issue mentioned in point 1.
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