method-chaining

问题 Edit See the title "Problem" at the end within my question to crack this question down. Coming from nodejs where we could chain promises, in C# I'm seeing Async Tasks almost comparable. Here's my attempt. Edit - I can't mark my uber level caller methods as async as a dll based library is calling it Caller object public void DoSomething(MyRequest request) { Delegate.Job1(request) .ContinueWith(Delegate.Job2) .ContinueWith(Fault, TaskContinuationOptions.OnlyOnFaulted) .ContinueWith(Result); }

问题 I was working with a javascript API and I saw this quote: Because JavaScript is a scripting language, every line of code takes up valuable processor time. One way to improve processor time is to chain method calls to reduce lines of code. Objects such as esri.Graphic and esri.symbol.* provide setter methods that return the object itself, allowing for chaining of methods. Less efficient: var symbol = new esri.symbol.SimpleMarkerSymbol(); symbol.setSize(10); symbol.setColor(new dojo.Color([255

问题 are there any approaches, given a statement like the following First().Second(); to know from within First() whether/when Second() has executed? Reference: http://martinfowler.com/dslwip/MethodChaining.html 回答1: Second() will not execute until First() has completed, therefore this is impossible. All that First() can do is to violate fluency, thereby making it impossible for Second() to run. 来源： https://stackoverflow.com/questions/2146623/method-chaining-and-the-finishing-problem

问题 With the functional interfaces introduced in Java 8, you can easily chain different expressions into one new expression, illustrated by the code snippet below. public class PredicateChaining { public static void main(String[] args) { // verbose, but standard JDK functionality only Predicate<String> allUpperCase = StringUtils::isAllUpperCase; Predicate<String> longerThan5 = s -> s.length() > 5; if (allUpperCase.and(longerThan5).test("PREDICATE")) { System.out.println("'PREDICATE' is a

问题 The challenge is about converting from method chain to standard linq a piece of code full of group by. The context To fully understand the topic here you can read the original question (with class definitions, sample data and so on): Linq: rebuild hierarchical data from the flattened list Thanks to @Akash Kava, I've found the solution to my problem. Chain method formulation var macroTabs = flattenedList .GroupBy(x => x.IDMacroTab) .Select((x) => new MacroTab { IDMacroTab = x.Key, Tabs = x

问题 The challenge is about converting from method chain to standard linq a piece of code full of group by. The context To fully understand the topic here you can read the original question (with class definitions, sample data and so on): Linq: rebuild hierarchical data from the flattened list Thanks to @Akash Kava, I've found the solution to my problem. Chain method formulation var macroTabs = flattenedList .GroupBy(x => x.IDMacroTab) .Select((x) => new MacroTab { IDMacroTab = x.Key, Tabs = x

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . I have a class that represents object. And I have a bunch of methods which modify this object state with no obvious return or obviously without any return. In C# I would declare all these methods as void and see no alternatives. But in Python I am about to make all the methods

问题 My question is in context of Method chaining + inheritance don’t play well together?. But unfortunately all examples/answers of method chaining uses single level of inheritance. My usecase involves multi level of inheritance for e.g abstract class PetBuilder{...} class DogBuilder extends PetBuilder{..} class DogType1Builder extends DogBuilder {...} To construct a Dog Object,i will be using either DogBuilder or DogType1Builder how to use getThis trick for the above use case? I want to use

问题 This question already has answers here : PHP method chaining? (8 answers) Closed 4 years ago . jQuery lets me chain methods. I also remember seeing the same in PHP so I wrote this: class cat { function meow() { echo "meow!"; } function purr() { echo "purr!"; } } $kitty = new cat; $kitty->meow()->purr(); I cannot get the chain to work. It generates a fatal error right after the meow. 回答1: To answer your cat example, your cat's methods need to return $this , which is the current object instance

问题 Is it possible to chain static methods together using a static class? Say I wanted to do something like this: $value = TestClass::toValue(5)::add(3)::subtract(2)::add(8)::result(); . . . and obviously I would want $value to be assigned the number 14. Is this possible? Update : It doesn't work (you can't return "self" - it's not an instance!), but this is where my thoughts have taken me: class TestClass { public static $currentValue; public static function toValue($value) { self::$currentValue