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.
Read moreHow do you use Future then in flutter?
A Future is defined exactly like a function in Dart, but instead of Void you use Future. If you want to return a value from Future, then you pass it a Type .
Read moreWhat is then in Dart?
then<R> method Null safety Register callbacks to be called when this future completes . When this future completes with a value, the onValue callback will be called with that value. If this future is already completed, the callback will not be called immediately, but will be scheduled in a later microtask.
Read moreWhat does await do in 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 moreWhy we use async and await in flutter?
Async and Await keywords are used to provide a declarative way to define the asynchronous function and use their results . The async keyword is used when we want to declare a function as asynchronous and the await keyword is used only on asynchronous functions.
Read moreWhat is async await and Future in flutter?
Async means that this function is asynchronous and you might need to wait a bit to get its result. Await literally means – wait here until this function is finished and you will get its return value. Future is a type that ‘comes from the future’ and returns value from your asynchronous function.
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