FutureOr<T> class Null safety A type representing values that are either Future<T> or T . This class declaration is a public stand-in for an internal future-or-value generic type, which is not a class type.
Read moreHow do you make a Future in darts?
To create a Future object, we need to instantiate Future class by passing an invoker function (usually an anonymous function or fat arrow function) whose job is to return a value or another Future object that returns a value . A Future object has then and catchError methods which are used to register callback functions.
Read moreWhat are Dart futures?
A Future represents a potential value, or error, that will be available at some time in the future . A Future can be complete with a value or with an error. Programmers can plug callbacks for each case. Futures and async and await keywords are used to perform asynchronous operations in Dart.
Read moreWhat does Future do in Dart?
A Future represents a potential value, or error , that will be available at some time in the future. A Future can be complete with a value or with an error. Programmers can plug callbacks for each case. Futures and async and await keywords are used to perform asynchronous operations in Dart.
Read moreWhat is await Flutter?
When you await an asynchronous function, the execution of the code within the caller suspends while the async operation is executed . When the operation is completed, the value of what was awaited is contained within a Future object.
Read moreWhat is then () in Flutter?
And then is use one by one step of code, store data in variable and then move to next . Example: If I click in follow button until data store in variable it continuously retrieve some data to store and not allow next function to run, and if one task is complete than move to another.4 Şub 2019
Read moreWhen complete vs then Flutter?
. whenComplete will fire a function either when the Future completes with an error or not, instead . then will fire a function after the Future completes without an error. This is the asynchronous equivalent of a “finally” block.
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