Asynchronous Processing RSS

Async When an async method is called, a Future is immediately returned, and the body of the method is executed later. Later on, as the body of the async function is executed, the Future returned by the function call will be completed along with its result. At the end of the async method, the value (from the completed Future) can be returned. Await Await expressions are used in async methods. They enable you to invoke asynchronous code (that returns a Future). Once the asynchronous code is invoked, the currently running function is suspended until the Future has completed or there is...

What is a Future? Futures are used to store the results of asynchronous processes.  As mentioned in Part One, asynchronous operations can result in Success (often with data) and Failure (often with error data).  A Future will store the data from the Success. Lets Run Some Code Go to your web-browser and navigate here: https://dartpad.dartlang.org. Paste the following code into the code area on the left-side: import 'dart:async'; String createLongString(int count){ print('start count up'); StringBuffer sb = new StringBuffer(); for (int i = 0; i < count; i++) { sb.write(" ${i}"); } print('finish count up'); return sb.toString(); } Future createFutureCounter(int...

What is Asynchronicity? It is the ability to do multiple things at the same time. UI Thread A thread is a thread of execution in a program. It is some programming that does something. When you have a user interface, it has a single thread that accepts user input from the user (in the form of events) and updates the user interface (rendering). This is known as the UI thread. Synchronous Operations A synchronous operation blocks a process till the operation completes. If you add a synchronous operation to a UI thread then it stops the UI from repainting, responding...