Calling an async method from a constructor in Dart

Probably the best way to handle this is with a factory function, which calls a private constructor. In Dart, private methods start with an underscore, and “additional” constructors require a name in the form ClassName.constructorName, since Dart doesn’t support function overloading. This means that private constructors require a name, which starts with an underscore (MyComponent._create … Read more

Testing with React’s Jest and Enzyme when simulated clicks call a function that calls a promise

Updated answer: using async / await leads to cleaner code. Old code below. I’ve successfully solved this problem by combining the following elements: Mock out the promise and make it resolve immediately Make the test asynchronous by marking the test function async After simulating the click, wait until the next macrotask to give the promise … Read more

Async/await and parallel in C# [closed]

async/await is about asynchrony, whereas Parallel.ForEach is about parallelism. They’re related concepts, but not the same. Parallel.ForEach is used when you want to execute the same operation on all the items in a collection, in parallel, blocking the current thread until all operations have completed. async/await is used when the current operation can’t make any … Read more

What is the difference between launch/join and async/await in Kotlin coroutines

launch is used to fire and forget coroutine. It is like starting a new thread. If the code inside the launch terminates with exception, then it is treated like uncaught exception in a thread — usually printed to stderr in backend JVM applications and crashes Android applications. join is used to wait for completion of … Read more