it is finished, and generally causes some work to happen in the background before triggering some future action in the application (as opposed to normal synchronous functions, which do every- thing they There are many styles of asynchronous interfaces: • Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of tornado.concurrent import Future def async_fetch_manual(url): http_client = AsyncHTTPClient() my_future = Future() fetch_future = http_client.fetch(url) def on_fetch(f): my_future.set_result(f.result().body)

tornado.autoreload — Automatically detect code changes in development tornado.concurrent — Work with Future objects tornado.log — Logging support tornado.options — Command-line parsing tornado.testing — Unit it is finished, and generally causes some work to happen in the background before triggering some future action in the application (as opposed to normal synchronous functions, which do everything they are returning). There are many styles of asynchronous interfaces: Callback argument Return a placeholder (Future, Promise, Deferred) Deliver to a queue Callback registry (e.g. POSIX signals) Regardless of which

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414 17.6. future、任务和线程 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . await 关键字。 future 是一个现在可能还没有准备好但将在未来某个时刻准备好的值。（相同的概念也出现在 很多语言中，有时被称为 “task” 或者 “promise”。）Rust 提供了 Future trait 作为基础组件， 这样不同的异步操作就可以在不同的数据结构上实现。在 Rust 中，我们称实现了 Future trait 的类型为 future。每个 future 会维护自身的进度状态信息以及对 并恢复。在一个 async 块或 async 函数中，可以使用 await 关键字来 await 一个 future（即等待其就绪）。async 块或 async 函 数中每一个等待 future 的地方都可能是一个 async 块或 async 函数中断并随后恢复的点。检 查一个 future 并查看其值是否已经准备就绪的过程被称为 轮询（polling）。 其它一些语言，例如 C# 和 JavaScript，也使用

ready to deploy quickly, innovative, and technologically advanced. That is the force for the future.” - Secretary Panetta, Defense Security Review, 5 Jan 12iii Foreword Department of Defense (DoD) on their successes and failures. We welcome your questions and feedback on the guidebook so that future editions can continue to advance Agile strategies and techniques across DoD. Please contact us such as the Global Combat Support System-Joint (GCSS-J), have adopted Agile methods to build a future increment or block of capability. Before deciding to adopt Agile practices, program managers should

IT capabilities together, we arrive at an asset that enables the enterprise to earn future revenues and reduce future costs—that is, an asset in the classic economic sense. This asset I will refer to as direction you choose. That is its latent value; the inverse of the cost of implementing changes in the future. What does such an EA, brimming with latent value, look like?  It has little technical debt. risk of buying a vendor’s product, where the investment is one large lump sum—and a commitment to future maintenance payments. Then, of course, there is the risk of the vendor going out of business or

Helper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1366 73 Future 1368 74 Interactive Utilities 1369 75 Lazy Artifacts 1379 76 LibCURL 1380 77 LibGit2 1381 78 definition! But there's an exception: future calls to newfun from the REPL work as expected, being able to both see and call the new definition of newfun. However, future calls to tryeval will continue to end return g g() = 0 end as it is not clear what function will end up getting defined. In the future, it might be an error to define local methods in this manner. For cases like this use anonymous

Helper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1366 73 Future 1368 74 Interactive Utilities 1369 75 Lazy Artifacts 1379 76 LibCURL 1380 77 LibGit2 1381 78 definition! But there's an exception: future calls to newfun from the REPL work as expected, being able to both see and call the new definition of newfun. However, future calls to tryeval will continue to end return g g() = 0 end as it is not clear what function will end up getting defined. In the future, it might be an error to define local methods in this manner. For cases like this use anonymous

Helper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1366 73 Future 1368 74 Interactive Utilities 1369 75 Lazy Artifacts 1379 76 LibCURL 1380 77 LibGit2 1381 78 definition! But there's an exception: future calls to newfun from the REPL work as expected, being able to both see and call the new definition of newfun. However, future calls to tryeval will continue to end return g g() = 0 end as it is not clear what function will end up getting defined. In the future, it might be an error to define local methods in this manner. For cases like this use anonymous

Helper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1171 71 Future 1172 72 Interactive Utilities 1173 73 Lazy Artifacts 1181 74 LibCURL 1182 75 LibGit2 1183 76 definition! But there's an exception: future calls to newfun from the REPL work as expected, being able to both see and call the new definition of newfun. However, future calls to tryeval will continue to end return g g() = 0 end as it is not clear what function will end up getting defined. In the future, it might be an error to define local methods in this manner. For cases like this use anonymous

Helper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1171 71 Future 1172 72 Interactive Utilities 1173 73 Lazy Artifacts 1181 74 LibCURL 1182 75 LibGit2 1183 76 definition! But there's an exception: future calls to newfun from the REPL work as expected, being able to both see and call the new definition of newfun. However, future calls to tryeval will continue to end return g g() = 0 end as it is not clear what function will end up getting defined. In the future, it might be an error to define local methods in this manner. For cases like this use anonymous