future

问题 I know this is quite an open ended question and I apologize. I can see that Await.ready returns Awaitable.type while Await.result returns T but I still confuse them. What are the difference between the two? Is one blocking and the other one non-blocking? 回答1: They both block until the future completes, the difference is just their return type. The difference is useful when your Future throws exceptions: def a = Future { Thread.sleep(2000); 100 } def b = Future { Thread.sleep(2000); throw new

问题 I know this is quite an open ended question and I apologize. I can see that Await.ready returns Awaitable.type while Await.result returns T but I still confuse them. What are the difference between the two? Is one blocking and the other one non-blocking? 回答1: They both block until the future completes, the difference is just their return type. The difference is useful when your Future throws exceptions: def a = Future { Thread.sleep(2000); 100 } def b = Future { Thread.sleep(2000); throw new

问题 How can I port the following function to dask in order to parallelize it? from time import sleep from dask.distributed import Client from dask import delayed client = Client(n_workers=4) from tqdm import tqdm tqdm.pandas() # linear things = [1,2,3] _x = [] _y = [] def my_slow_function(foo): sleep(2) x = foo y = 2 * foo assert y < 5 return x, y for foo in tqdm(things): try: x_v, y_v = my_slow_function(foo) _x.append(x_v) if y_v is not None: _y.append(y_v) except AssertionError: print(f'failed:

问题 How can I port the following function to dask in order to parallelize it? from time import sleep from dask.distributed import Client from dask import delayed client = Client(n_workers=4) from tqdm import tqdm tqdm.pandas() # linear things = [1,2,3] _x = [] _y = [] def my_slow_function(foo): sleep(2) x = foo y = 2 * foo assert y < 5 return x, y for foo in tqdm(things): try: x_v, y_v = my_slow_function(foo) _x.append(x_v) if y_v is not None: _y.append(y_v) except AssertionError: print(f'failed:

问题 How can I port the following function to dask in order to parallelize it? from time import sleep from dask.distributed import Client from dask import delayed client = Client(n_workers=4) from tqdm import tqdm tqdm.pandas() # linear things = [1,2,3] _x = [] _y = [] def my_slow_function(foo): sleep(2) x = foo y = 2 * foo assert y < 5 return x, y for foo in tqdm(things): try: x_v, y_v = my_slow_function(foo) _x.append(x_v) if y_v is not None: _y.append(y_v) except AssertionError: print(f'failed:

问题 How can I port the following function to dask in order to parallelize it? from time import sleep from dask.distributed import Client from dask import delayed client = Client(n_workers=4) from tqdm import tqdm tqdm.pandas() # linear things = [1,2,3] _x = [] _y = [] def my_slow_function(foo): sleep(2) x = foo y = 2 * foo assert y < 5 return x, y for foo in tqdm(things): try: x_v, y_v = my_slow_function(foo) _x.append(x_v) if y_v is not None: _y.append(y_v) except AssertionError: print(f'failed:

问题 I want to create a DAG out of tasks in Java, where the tasks may depend upon the output of other tasks. If there is no directed path between two tasks, they may run in parallel. Tasks may be canceled. If any task throws an exception, all tasks are canceled. I wanted to use CompleteableFuture for this, but despite implementing the Future interface (including Future.cancel(boolean) , CompletableFuture does not support cancelation -- CompletableFuture.cancel(true) is simply ignored. (Does

问题 I am building an app which uses an api and I am using the future builder to fetch the data but the problem is when the state changes it rebuilds and I want to prevent this from happen. Thanks, 回答1: try using this : class Example extends StatefulWidget { @override _ExampleState createState() => _ExampleState(); } class _ExampleState extends State<Example> { Future<response> future; @override void initState() { future = _asyncmethodCall(); super.initState(); } @override Widget build

问题 I am building an app which uses an api and I am using the future builder to fetch the data but the problem is when the state changes it rebuilds and I want to prevent this from happen. Thanks, 回答1: try using this : class Example extends StatefulWidget { @override _ExampleState createState() => _ExampleState(); } class _ExampleState extends State<Example> { Future<response> future; @override void initState() { future = _asyncmethodCall(); super.initState(); } @override Widget build

来源： https://stackoverflow.com/questions/64277935/future-returns-list-before-being-populated