async-await

问题 I am trying to use the very new Django 3.1 Async view classes. Based on the limited documentation available, I have tried to create my own async def __call__() method. From the documents: For a class-based view, this means making its __call__() method an async def (not its __init__() or as_view() ). Django 3.1 Development Documents However, until now I have had no luck with writing an asynchronous class based view. I constantly get await exceptions, or asyncio.iscoroutinefunction returns

问题 I am trying to use the very new Django 3.1 Async view classes. Based on the limited documentation available, I have tried to create my own async def __call__() method. From the documents: For a class-based view, this means making its __call__() method an async def (not its __init__() or as_view() ). Django 3.1 Development Documents However, until now I have had no luck with writing an asynchronous class based view. I constantly get await exceptions, or asyncio.iscoroutinefunction returns

问题 I am trying to use the very new Django 3.1 Async view classes. Based on the limited documentation available, I have tried to create my own async def __call__() method. From the documents: For a class-based view, this means making its __call__() method an async def (not its __init__() or as_view() ). Django 3.1 Development Documents However, until now I have had no luck with writing an asynchronous class based view. I constantly get await exceptions, or asyncio.iscoroutinefunction returns

问题 As Async always returns promise, we have to resolve it to get the value. I need to export it's value (returned object) so that we can use it in another module. export const getClient = async () => { return await HttpService.getValueFromSettings('durl').then((response) => { if(isValidResponse(response)) { endpoint = response.data; export const client = createClient(response.data); //This is where getting error that we can not export in side the function } } }) } I need to use client in another

问题 As Async always returns promise, we have to resolve it to get the value. I need to export it's value (returned object) so that we can use it in another module. export const getClient = async () => { return await HttpService.getValueFromSettings('durl').then((response) => { if(isValidResponse(response)) { endpoint = response.data; export const client = createClient(response.data); //This is where getting error that we can not export in side the function } } }) } I need to use client in another

问题 I want to call some of my functions which are asynchronous to be called from within my ejs files. Like I have this functions set as my app.locals.someFunction async someFunction(param){ let data = await someAsyncStuff(); // & other things return data; } and I want to use it inside ejs file as below: <% let data = await someFunction() for(let x of data){%> <li><%=x%></li> <%}%> This is possible with ejs if {async:true} is passed as an option. But where exactly should I pass this when my view

问题 A quick google search will tell you to avoid using async void myMethod() methods when possible. And in many cases there are ways to make it possible. My question is basically an offshoot of this best practice: What does the lambda expression below evaluate to? Task.Run( async ()=> await Task.Delay(1000)); If it becomes an async Task then we are following best practice. But what if it evaluates to async void ? 回答1: The documentation for expression lambdas says, An expression lambda returns the

问题 Which of async/await or Observable should be used to call backend services on Angular? Using async/await makes it easier to see the source code, so I would like to use async/await. In that case I think that it can be used with Observable#toPromise. However, Angular's manual only shows examples using Obseravable, so should I use Observable? 回答1: IMO observables are more difficult to handle than javascript promises, first because they don't have first-level support in the javascript syntax

问题 i'm currently upgrading some existing code for use by windows universal and am struggling to convert a command pattern to work with the new async/await functionality. I have a command scheduler class that runs within its own thread and processes commands that have been added to its queue. The method in question looks like this: private List<ICommandItem> _items; private void ProcessCommands() { while(_items.count > 0) { _items[0].Execute(); _items.RemoveAt(0); } } My problem is that some of

问题 i'm currently upgrading some existing code for use by windows universal and am struggling to convert a command pattern to work with the new async/await functionality. I have a command scheduler class that runs within its own thread and processes commands that have been added to its queue. The method in question looks like this: private List<ICommandItem> _items; private void ProcessCommands() { while(_items.count > 0) { _items[0].Execute(); _items.RemoveAt(0); } } My problem is that some of