Flutter for Beginners

The Flutter compute() function

The compute() method is intended to be a facilitator for the task of spawning a new isolate, sending a message to it, and getting a response back. Its signature goes as follows:

Future<R> compute <Q, R>( ComputeCallback<Q, R> callback, Q message, { String debugLabel })

A few parameters describe the request to the new isolate:

• callback: This is a top-level function to be executed in the new Isolate. Note ComputeCallback. There are generic type annotations <Q, R>; the first one, Q, denotes the input type of the callback, and R denotes the result type of the computation. Note from the documentation says:

"The callback argument must be a top-level function, not a closure or an instance or static method of a class." ...