methods

问题 I'm new and I'm learning webdriver and java:) I have beginner question. I created classes whit locators(findBy) and methods working with this locators ( senKeys() , click() , etc.) - I use pagefactory . HomePage LoginPage ... My main class AddNewLeadTest is a class where i initialize method from classes with locators, and I do it like this: HomePage hp = new HomePage(driver); hp.loginButton.click() I would like do to this like this: HomePage.loginButton.click() It's faster and I will not have

问题 This must be a duplicate but i haven't found it. I've found this question which is related since it answers why it's recommended to use a method group instead of a lambda. But how do i use an existing method group instead of a lambda if the method is not in the current class and the method is not static ? Say i have a list of ints which i want to convert to strings, i can use List.ConvertAll , but i need to pass a Converter<int, string> to it: List<int> ints = new List<int> { 1 }; List<string

问题 I want to declare a method in an interface where the parameter of the method defined in implementing classes can be a subtype of a specific java class for example: interface Processor{ processRequest( Request r); } public class SpecialRequest extends Request{...} public class SpecialProcessor implements Processor{ processRequest(SpecialRequest r){...} } but I get errors in the SpecialProcessor because it doesn't properly implement the Processor interface. What can I change in the Processor

问题 I have 2 Forms (Form1 and Form2) and a class (Class1). Form1 contains a button (Button1) and Form2 contains a RichTextBox (textBox1) When I press Button1 on Form1, I want the method (DoSomethingWithText) to be called. I keep getting "NullReferenceException - Object reference not set to an instance of an object". Here is a code example: Form1: namespace Test1 { public partial class Form1 : Form { Form2 frm2; Class1 cl; public Form1() { InitializeComponent(); } private void button1_Click(object

问题 Let's say I have this interface: interface Foo<T extends Foo<T>> { // ... } And the following three classes implementing it: class TrueFoo implements Foo<TrueFoo > { // ... } class FalseFoo implements Foo<FalseFoo> { // ... } class WrongFoo implements Foo<FalseFoo> { // ... } // ^^^^^^^^ this here is wrong, only // Foo<WrongFoo> should be allowed What would the method signature of the following method need to be to enforce that I can return objects of type TrueFoo or FalseFoo, but not

问题 Hey i'm trying to call child class method(ChildClass extends SuperClass()) SuperClass s=new ChildClass(); s.childClassMethod(); It doesn't see the ChildClass method the only methods i can call are from SuperClass() i know it's propably a stupid question but anyway cheers 回答1: That's right, you can't see it because s is type SuperClass which doesn't have this method - this would obviously break Polymorphism principle. So you either have to change the code like ((ChildClass) s).childClassMethod

问题 Im getting fairly confused as the book im reading is delving into the NSNumber class and talks about all the different methods you can call on it. I have a couple questions: 1.) Do you not have to call a typical alloc or init on foundation classes? 2.)in what cases would you use, say, numberWithChar: as opposed to initWithChar (i think this is the part that is messing me up the most, not really sure im groking this concept on the level i need to be, if you folks could break it down for me I

问题 In the Working with the Attribute Node chapter in Learning Javascript - A Hands-On Guide to the Fundamentals of Modern Javascript, the author Tim Wright said on Page 73: Removing an attribute is as simple as getting one. We just target the element node and use the method removeAttribute() to get it out of there. There are no Javascript exceptions thrown if you try to remove an attribute that doesn't exist , but it's still best practive to use the same hasAttribute() method we mentioned

问题 I am writing some real-time audio processing code, which is to be executed in an audio unit's render callback. This thread is at the highest priority level the system recognises. Apple instructs to minimise the amount of processing that goes on in this call. One of their recommendations is to avoid Objective-C method invocation. But why? What happens when an Objective-C method is invoked? what is the actual overhead? 回答1: Objective-C method resolution is dynamic. In other languages such as C

问题 The basic question is: How do I perform a basic override of a plugin method without editing the original plugin file? Is it possible to create an override for a specific instance: Example: An rtf plugin uses: $('selector').wysiwyg('setContent',newContent); In order to display the rtf text as readonly I would like for the same method to be applied to a div instead of the body of the IFRAME I would like to overwrite the original 'setContent' with my own code, just for this one element. Thanks