ASYNC / AWAIT SyntaxError: await is only valid in async functions and the top level bodies of modules
You can use an IIFE here (Read more about it here) (async function main () { // You can use await inside this function block })();
asynchronous
When is the best place to use Task.Result instead of awaiting Task
Let’s make sure to not bury the lede here: So for example: [some correct code] becomes [some incorrect code] NEVER NEVER NEVER DO THIS. Your instinct that you can restructure your control flow to improve performance is excellent and correct. Using Result to do so is WRONG WRONG WRONG. The correct way to rewrite your … Read more
Designing a fluent Javascript interface to abstract away the asynchronous nature of AJAX
Give a look to the following article published just a couple of days ago by Dustin Diaz, Twitter Engineer on @anywhere: Asynchronous method queue chaining in JavaScript He talks about a really nice technique that allows you to implement a fluent interface on asynchronous methods, basically methods chained together independent of a callback, using a … Read more
Await and SynchronizationContext in a managed component hosted by an unmanaged app
This is going to be a bit long. First of all, thanks Matt Smith and Hans Passant for your ideas, they have been very helpful. The problem was caused by a good old friend, Application.DoEvents, although in a novelty way. Hans has an excellent post about why DoEvents is an evil. Unfortunately, I’m unable to … Read more
Can PHP asynchronously use sockets?
Yup, that’s what socket_set_nonblock() is for. Your socket interaction code will need to be written differently, taking into account the special meanings that error codes 11, EWOULDBLOCK, and 115, EINPROGRESS, assume. Here’s some somewhat-fictionalized sample code from a PHP sync socket polling loop, as requested: $buf=””; $done = false; do { $chunk = socket_read($sock, 4096); … Read more
Using async / await with DataReader ? ( without middle buffers!)
I want to do Asynchronous I/O calls (using async await) – but : Without using DataFlow dependency ( like in this answer) Without middle buffers( not like this answer) The Projector function should be sent as an argument. ( not like this answer) You may want to check Stephen Toub’s “Tasks, Monads, and LINQ” for … Read more
Android: BLE how to read multiple Characteristics?
Pseudocode: Use a FIFO Queue or Priority Queue depends upon your business logic insert all the characteristics you want to read call your requestCharacteristics method so that it can start consuming your Queue from your onCharacteristicsRead call see if the size of the queue is greater than Zero requests one more.. be sure to peek() … Read more
Async and Await with For Loop [duplicate]
High Level – Are async/await the best choice, or should I use a different approach? async-await is perfect for what you’re attempting to do, which is concurrently offloading multiple IO bound tasks. What needs to be updated to allow the loop to kick off all the jobs without blocking, but not allow the function to … Read more
Dart Future.wait for multiple futures and get back results of different types
You need to adapt each of your Future<T>s to a common type of Future. You could use Future<void> and assign the results instead of relying on return values: late List<Foo> foos; late List<Bar> bars; late List<FooBars> foobars; await Future.wait<void>([ downloader.getFoos().then((result) => foos = result), downloader.getBars().then((result) => bars = result), downloader.getFooBars().then((result) => foobars = result), ]); … Read more
AspNetSynchronizationContext
Am I correct that It does guarantee your continuations will get the same HttpContext.Current as original callers? It does not guarantee the continuations will execute on the same thread as the callers? Yes, HttpContext.Current is preserved, and yes, the continuations may execute on a different thread. I mean principal/culture associated with the thread and thread … Read more