Class testTypeClass = TestClassType.class; System.out.println("testTypeClass--" + testTypeClass); // 测试Object.getClass() TestClassType testGetClass = new TestClassType(); System.out.println("testGetClass--" + testGetClass.getClass()); } catch (ClassNotFoundException e) { e.printSt...
#define int PARA 表示在源程序中的所在int将会被PARA原样代替! 如:程序中有int a,b ;则在编译前将被替换为PAPA a,b; #define是C中定义的语法,typedef是C++中定义的语法,二者在C++中可以通用,但#define成了预编译指令,typedef当成语句处理。 Typedef和define都可以用来给对象取一个别名,但是两者却有着很大不...
TypeScript provides a convenient way to define class members in the constructor, by adding a visibility modifiers to the parameter. Example classPerson { // name is a private member variable publicconstructor(privatename: string) {} publicgetName(): string { ...
type MyFunction=typeofdoSomething;//(str: string) => numbertype MyArray =typeofvalues;//number[]//class 有点特别哦, 因为它本身已经是类型了.class Person { str= ''; static num= 0; } type PersonInstanceType= Person;//{ str: string } class 是 new 出来对象的类型type PersonClassType =t...
class Greeter { readonly name: string = "world"; constructor(otherName?: string) { if (otherName !== undefined) { this.name = otherName; } } err() { this.name = "not ok"; //Cannot assign to 'name' because it is a read-only property. ...
(idOrSingleton&&Container.has(idOrSingleton)){thrownewError(`Service:此标识符(${idOrSingleton})已被注册.`);}_id=idOrSingleton||Symbol(target.name);_singleton=singleton;}Reflect.defineMetadata('cus:id',_id,target);if(_singleton){_singleInstance=newtarget();}Container.set(_id,_singleInstance|...
//在对象或属性上定义源数据Reflect.defineMetadata(metadataKey,metadataValue,target);Reflect.defineMetadata(metadataKey,metadataValue,target,propertyKey);// 检查某个源数据的 key 是否存在某个对象或属性上letresult=Reflect.hasMetadata(metadataKey,target);letresult=Reflect.hasMetadata(metadataKey,target,property...
== undefined) module.exports = v; } else if (typeof define === "function" && define.amd) { define(["require", "exports", "./constants.js"], factory); }})(function (require, exports) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true ...
A rest element must be last in a tuple type.TypeScript 4.0可以放宽此限制。请注意，在没有已知长度的类型的情况下，结果类型也将变得不受限制，并且所有以下所有元素都将成为结果其余元素类型。type Strings = [string, string];type Numbers = number[]// [string, string, ...Array<number | boolean>...
TypeScript 4.5 supports an ECMAScript proposal for checking whether an object has a private field on it. You can now write a class with a#privatefield member and see whether another object has the same field by using theinoperator.