future

In this lesson you will learn to talk about things in the future. 课上内容（Lesson） Positive 正面 future is good（美好） --> optimist(s) n. 乐观主义者；乐天派 optimist ic adj. 乐观的；乐观主义的 is bright 光明的 is wonderful 精彩；美好的 Negative 负面 future is bleak （黯淡） --> pessimist(s) n. 悲观主义者 pessimist ic adj. 悲观的，厌世的；悲观主义的 is bad 不好的 is worse 更不好的 词汇（Key Word ） assist vt. 帮助；促进 billionaire n.亿万富翁 cancer n.癌症；恶性肿瘤 climate n. 气候；风气；思潮；风土 control vt.控制 energy n.精力；能量 environmental adj. 环境的，周围的；有关环境的 eventually adv. 最后，终于 fuel n. 燃料；刺激因素；（为身体提供能量的）食物 hurricane /ˈhɜːrəkeɪn/ n.飓风 # 龙卷风 tornado # 暴风 storm invest vt.投资；投入 planet /'plæ

I was hoping code like follows would wait for both futures, but it does not. object Fiddle { val f1 = Future { throw new Throwable("baaa") // emulating a future that bumped into an exception } val f2 = Future { Thread.sleep(3000L) // emulating a future that takes a bit longer to complete 2 } val lf = List(f1, f2) // in the general case, this would be a dynamically sized list val seq = Future.sequence(lf) seq.onComplete { _ => lf.foreach(f => println(f.isCompleted)) } } val a = FuturesSequence I assumed seq.onComplete would wait for them all to complete before completing itself, but not so; it

I have two functions which return Futures. I'm trying to feed a modified result from first function into the other using a for-yield comprehension. This approach works: val schoolFuture = for { ud <- userStore.getUserDetails(user.userId) sid = ud.right.toOption.flatMap(_.schoolId) s <- schoolStore.getSchool(sid.get) if sid.isDefined } yield s However I'm not happy with having the "if" in there, it seems that I should be able to use a map instead. But when I try with a map: val schoolFuture: Future[Option[School]] = for { ud <- userStore.getUserDetails(user.userId) sid = ud.right.toOption

手工创建一个线程池，执行callable任务 /** * @Information: * @Author: HeHaoYuan * @Date: Created at 13:48 on 2019/8/12 * @Package_Name: PACKAGE_NAME */ import java.util.concurrent.*; public class MyExecutorService implements Callable { int tick = 20; @Override public String call() throws Exception { for (int i = 0; i < 20; i++) { if (tick > 0) { System.out.println(Thread.currentThread().getName()+"票还剩下" + tick-- + "张"); } } return "票已经卖完"; } } class ExecutorTest { public static void main(String[] args) throws ExecutionException, InterruptedException { MyExecutorService thread1 = new MyExecutorService(); /** *

I'm confusing myself with difference between a future and a promise. Obviously, they have different methods and stuff, but what is the actual use case? Is it?: when I'm managing some async task, I use future to get the value "in future" when I'm the async task, I use promise as the return type to allow the user get a future from my promise Future and Promise are the two separate sides of an asynchronous operation. std::promise is used by the "producer/writer" of the asynchronous operation. std::future is used by the "consumer/reader" of the asynchronous operation. The reason it is separated

What's the difference between Future and Promise ? They both act like a placeholder for future results, but where is the main difference? According to this discussion , Promise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains: A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion. An example is also given on the list: f.then((s -> aStringFunction(s)).thenAsync(s -> ...); Note that the final API is slightly different but

I'm trying to create a rowcount-query from a regular query, but the resulting SQL seems to lack the GROUP BY resulting in a wrong count. Does anyone know what I'm doing wrong. First the queries: var query = Session.QueryOver<InkoopFactuurListItem>() .Where(i => i.KlantId == Klant.Id) .AndRestrictionOn(i => i.Status).IsIn(statussen) .SelectList(list => list .SelectGroup(h => h.Id).WithAlias(() => dto.Id) .SelectGroup(h => h.Banknummer).WithAlias(() => dto.Banknummer) .SelectGroup(h => h.CrediteurNaam).WithAlias(() => dto.CrediteurNaam) .SelectGroup(h => h.DienstType).WithAlias(() => dto

剖析 love past and future是游戏名 Pro 代表他用c++的特性重写（之前用的C） 4代表是4.0ver Mineopensource 代表它是开源的（在github上） log 来源： https://www.cnblogs.com/caiyuchen/p/11381933.html