action

Executing dynamic list of Actions with parameters

由 a 夏天 提交于 2020-06-27 17:12:08
问题 I'm building a list of Actions based on some other data. Each action should do a call to a method, and the list of actions should be performed in parallel. I have the following code that works just fine for parameterless methods: private void Execute() { List<Action> actions = new List<Action>(); for (int i = 0; i < 5; i++) { actions.Add(new Action(DoSomething)); } Parallel.Invoke(actions.ToArray()); } private void DoSomething() { Console.WriteLine("Did something"); } But how can I do

Action<> multiple parameters syntax clarification

由 我只是一个虾纸丫 提交于 2020-05-26 12:47:22
问题 Sometimes I can't understand the simplest things, i'm sure it's in my face, i just fail to see it. Im trying to create a delegate for a method in this simple class: public static class BalloonTip { public static BalloonType BalType { get; set; } public static void ShowBalloon(string message, BalloonType bType) { // notify user } } Now, this Action<> is supposed to create the delegate without actually declaring one with the keyword "delegate", did I understand correctly? Then: private void

Action<> multiple parameters syntax clarification

由 梦想与她 提交于 2020-05-26 12:46:49
问题 Sometimes I can't understand the simplest things, i'm sure it's in my face, i just fail to see it. Im trying to create a delegate for a method in this simple class: public static class BalloonTip { public static BalloonType BalType { get; set; } public static void ShowBalloon(string message, BalloonType bType) { // notify user } } Now, this Action<> is supposed to create the delegate without actually declaring one with the keyword "delegate", did I understand correctly? Then: private void

Django admin action with intermediate page: not getting info back

由 左心房为你撑大大i 提交于 2020-05-15 06:25:09
问题 I'm trying to create an admin action that adds a custom time delta to some date. The time delta will be read from a input in the intermediate page. After confirming it, I will apply that delta to every instance selected previously. Using this code (I simplified for this question) I can't get the value of the entered time delta. I can't tell whether the user pressed the "Apply" button. models.py class Match(models.Model): date_of_match=models.DateTimeField() admin.py class MatchAdmin(admin

Struts 2: textbox label is not displayed

由 纵饮孤独 提交于 2020-05-14 01:38:10
问题 I am new to Struts 2 and started to build my new application. I created a JSP page with simple textbox and a button but my textbox labels are not getting displayed. here is my JSP code, <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html;

Struts 2: textbox label is not displayed

由 别说谁变了你拦得住时间么 提交于 2020-05-14 01:37:36
问题 I am new to Struts 2 and started to build my new application. I created a JSP page with simple textbox and a button but my textbox labels are not getting displayed. here is my JSP code, <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html;

What is the semantics of UML's ReadVariableAction in BoUML?

由 十年热恋 提交于 2020-04-30 05:10:27
问题 ReadVariableAction activity action in BoUML allows to choose a class and its attribute and returns the attribute through creation of output pin (see figure below and BoUML documentation): But what is the semantic of that action? What does ReadVariableAction operation actually return? According to clause 16.9.3.1 Variable Action of The Unified Modeling Language Specification Version 2.5: A VariableAction operates on a statically-specified Variable. The Variable must be one that is defined

What is the semantics of UML's ReadVariableAction in BoUML?

由 风格不统一 提交于 2020-04-30 05:10:11
问题 ReadVariableAction activity action in BoUML allows to choose a class and its attribute and returns the attribute through creation of output pin (see figure below and BoUML documentation): But what is the semantic of that action? What does ReadVariableAction operation actually return? According to clause 16.9.3.1 Variable Action of The Unified Modeling Language Specification Version 2.5: A VariableAction operates on a statically-specified Variable. The Variable must be one that is defined

Play 2.0 用户指南 － 异步HTTP编程 －－针对Scala开发者

由 有些话、适合烂在心里 提交于 2020-04-07 11:29:12
处理异步结果 为什么需要异步结果？ 目前为止，我们能够直接向客户端发送响应。 然而情况不总是这样：结果可能依赖于一个繁重的计算和一个长时间的web service调用。 缘于 Play 2.0 的工作方式，action代码必须尽可能的快（如，非阻塞）。那，未能生成最终结果前，应该返回什么呢？答案是返回一个 promise(承诺？) of response！ A Promise [Result] 最终会赎回一个Result类型的值。使用 Promise[Result] 替换正常的Result，我们可以无阻塞的快速生成结果。该响应是一个返回Result的承诺（Promise）。 等待响应的时候，web客户端將会被阻塞，但服务器不会被阻塞，空闲资源可以移做它用。 怎样创建Promise[Result] 为了创建Promise[Result]，我们首先需要另一个promise：该promise將为我们计算实际的结果值。 val promiseOfPIValue: Promise[Double] = computePIAsynchronously() val promiseOfResult: Promise[Result] = promiseOfPIValue.map { pi => Ok("PI value computed: " + pi) } 所有的 Play 2.0

Func和Action

由 旧巷老猫 提交于 2020-04-03 13:24:12
Func委托 封装一个带有返回 TResult 参数指定的类型值的方法 ，它有 5 个重载： · Func<TResult> · Func<T,TResult> · Func<T1,T2,TResult> · Func<T1,T2,T3,TResult> · Func<T1,T2,T3,T4,TResult> 这里用一个举例说明：以 Func<T,TR> 这个来说明。这个从根源讲要说到委托（ delegate ）。这个方法的意义是有一个 T 参数，且返回值类型为 TR 类型的方法。 （ 1 ）按常规来做的方法为 定义一个返回 bool 的方法。 public bool IsTen( int i) { return i == 10 ? true : false ; } 测试 [Test] public void TestFun1() { Assert.AreEqual( true , IsTen( 10 )); } （ 2 ）通过委托来实现 delegate bool IsTenDelegate( int i); public bool IsTen( int i) { return i == 10 ? true : false ; } [Test] public void TestFun1() { // IsTenDelegate d = IsTen; IsTenDelegate d
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