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

is node.js’ console.log asynchronous?

Update: Starting with Node 0.6 this post is obsolete, since stdout is synchronous now. Well let’s see what console.log actually does. First of all it’s part of the console module: exports.log = function() { process.stdout.write(format.apply(this, arguments) + ‘\n’); }; So it simply does some formatting and writes to process.stdout, nothing asynchronous so far. process.stdout is … Read more

asynchronous and non-blocking calls? also between blocking and synchronous

In many circumstances they are different names for the same thing, but in some contexts they are quite different. So it depends. Terminology is not applied in a totally consistent way across the whole software industry. For example in the classic sockets API, a non-blocking socket is one that simply returns immediately with a special … Read more