modifier

问题 Let's say I have 3 classes class1 , class2 and class3 . How can I have it that class1 can only get instantiated by class2 ( class1 object = new class1() ) but not by class3 or any other class? I think it should work with modifiers but I am not sure. 回答1: I want to rename your classes to Friend , Shy and Stranger . The Friend should be able to create Shy , but Stranger should not be able to. This code will compile: package com.sandbox; public class Friend { public void createShy() { Shy shy =

问题 Let's say I have 3 classes class1 , class2 and class3 . How can I have it that class1 can only get instantiated by class2 ( class1 object = new class1() ) but not by class3 or any other class? I think it should work with modifiers but I am not sure. 回答1: I want to rename your classes to Friend , Shy and Stranger . The Friend should be able to create Shy , but Stranger should not be able to. This code will compile: package com.sandbox; public class Friend { public void createShy() { Shy shy =

来源： https://stackoverflow.com/questions/63600780/ts-js-overwrite-a-function-and-call-original-function-within

来源： https://stackoverflow.com/questions/62602166/how-to-use-same-set-of-modifiers-for-various-shapes

问题 I was working on the Android library which I'm developing in Kotlin. I kept access modifier of some classes as internal . Internal classes are only visible in that library module in Kotlin. If I implement that library in the app then it's not visible at all. But the problem comes when accessing that library from Java code. If I create .java file and type name of that internal class of library then IDE is suggesting name and it's resolved and compiled without any error. For e.g. Library Module

问题 Alright, I've been programming in Java for the better part of three years, now, and consider myself very experienced. However, while looking over the Java SE source code, I ran into something I didn't expect: in class Double : public static final double MIN_NORMAL = 0x1.0p-1022; // 2.2250738585072014E-308 public static final double MIN_VALUE = 0x0.0000000000001P-1022; // 4.9e-324 I did not expect this and can't find out what it means. If you don't know, I'm referring to the p and P that are

问题 Good day! In SwiftUI, is it possible to use a modifier only for a certain os target? In the following code I would like to use the modifier .listStyle(SidebarListStyle()) only for the MacOS target because it does not exist for the iOS target. Thanks for you help. import SwiftUI struct ContentView: View { @State var selection: Int? var body: some View { HStack() { NavigationView { List () { NavigationLink(destination: FirstView(), tag: 0, selection: self.$selection) { Text("Click Me To Display

问题 I have a bunch of regular expressions like lower = /[a-z]/ Later in my program i need to use this as /[a-z]/g ie. i need to add the 'global' modifier later. So how to add a modifier to an existing regular expression? 回答1: Use RegEx source and flags to separate the regular expression from the flags. Then create a new one with the string and set the needed flags. var re = /^[a-z]*$/; var re2 = new RegExp(re.source, re.flags + "i"); console.log( re.test("abc") ) console.log( re.test("ABC") )

问题 I have a bunch of regular expressions like lower = /[a-z]/ Later in my program i need to use this as /[a-z]/g ie. i need to add the 'global' modifier later. So how to add a modifier to an existing regular expression? 回答1: Use RegEx source and flags to separate the regular expression from the flags. Then create a new one with the string and set the needed flags. var re = /^[a-z]*$/; var re2 = new RegExp(re.source, re.flags + "i"); console.log( re.test("abc") ) console.log( re.test("ABC") )

问题 I have tried KeyDown and NSEvent , but they require a NSWindow object to be active. My hope is that I can put an app on the status bar and alert the user when it has pressed CapsLock , even if the user is in any other app. My app idea doesn't have a window for settings or anything else, is just an indicator. Can it even be done? I am guessing the AppDelegate but can't figure out how to make it receive modifier events. Any help really appreciated! I have looked on stack overflow for a