// Create new property with getter and setter Object.defineProperty(target, key, { get: getter, set: setter, enumerable: true, configurable: true }); } class Person { @logProperty public name: string; constructor(name : string) { this.name = name; } } const p1 = new Person("semli...
constx:[string,number]=['hello',0]// 上述元组可以看做为:interfaceTupleextendsArray<string|number>{0:string;1:number;length:2;} object。表示非原始类型。比如枚举、数组、元组都是 object 类型。 枚举类型 声明枚举类型时,如果没有显式的赋值,那么枚举值从 0 递增。如果显式赋值,那么后面的值从当前值...
// Create new property with getter and setter Object.defineProperty(target, key, { get: getter, set: setter, enumerable: true, configurable: true }); } class Person { @logProperty public name: string; constructor(name : string) { this.name = name; } } const p1 = new Person("semlinker...
let value: unknown; let value1: unknown = value; // OK let value2: any = value; // OK let value3: boolean = value; // Error let value4: number = value; // Error let value5: string = value; // Error let value6: object = value; // Error let value7: any[] = value; /...
1.object 类型 object 类型是:TypeScript 2.2 引入的新类型,它用于表示非原始类型。 2.Object 类型 Object 类型:它是所有 Object 类的实例的类型,它由以下两个接口来定义: Object 接口定义了 Object.prototype 原型对象上的属性; ObjectConstructor 接口定义了 Object 类的属性。
/*** Parses a JSON file.** @param path - Full path to the file.* @returns An object containing the JSON data.** @example Parsing a basic JSON file** # Contents of `file.json`* ```json* {* "exampleItem": "text"* }* ```** # Usage* ```ts* const result = parseFile("...
classifiableNames = createMap<string>(); symbolCount = 0; skipTransformFlagAggregation = file.isDeclarationFile; Symbol = objectAllocator.getSymbolConstructor(); if (!file.locals) { bind(file); file.symbolCount = symbolCount; file.classifiableNames = classifiableNames; ...
{ loggerOptions.meta=false;// when not debugging, log requests as one-liners}// initialize the logger with the above configurationapp.use(expressWinston.logger(loggerOptions));// here we are adding the UserRoutes to our array,// after sending the Express.js application object to have the ...
The key idea of this feature is to make it easy for decorators to create and consume metadata on any class they’re used on or within. Whenever decorator functions are used, they now have access to a newmetadataproperty on their context object. Themetadataproperty just holds a simple object...
log(`Set: ${key} => ${newVal}`); this[backingField] = newVal; }; // Create new property with getter and setter Object.defineProperty(target, key, { get: getter, set: setter, enumerable: true, configurable: true }); } class Person { @logProperty public name: string; constructor(...