AI代码解释 exportfunctioncombineReducers<S,AextendsAction=Action>(reducers:ReducersMapObject<S,A>):Reducer<S,A>;/** 根据 Reducer Map 返回 全局 State */exporttype ReturnState<ReducerMap>={[keyinkeyof ReducerMap]:ReducerMap[key]extends(state:any,action:any)=>inferR?R:any};exporttype GlobalState...
functionLog(target:Function,key:string,parameterIndex:number){letfunctionLogged=key||target.prototype.constructor.name;console.log(`The parameter in position${parameterIndex}at${functionLogged}has been decorated`);}classGreeter{greeting:string;constructor(@Log phrase:string){this.greeting=phrase;}}// c...
for...in... 一般用于循环对象 let keyValue:string; let objectList:object={ name:'小白狼', age:'27', gender:'女'}for(let keyValueinobjectList){ console.log(keyValue+':'+objectList[keyValue]) } 打印结果 name:小白狼 age:27 gender:女 for...of... 允许你遍历 Arrays(数组), Strings(...
function LogOutput(tarage: Function, key: string, descriptor: any) { let originalMethod = descriptor.value; let newMethod = function(...args: any[]): any { let result: any = originalMethod.apply(this, args); if(!this.loggedOutput) { this.loggedOutput = new Array<any>(); } this.l...
That’s why TypeScript 4.1 allows you to re-map keys in mapped types with a new as clause. Copy type MappedTypeWithNewKeys<T> = { [K in keyof T as NewKeyType]: T[K] // ^^^ // This is the new syntax! } With this new as clause, you can leverage features like template liter...
exportfunctioncombineReducers<S,AextendsAction=Action>(reducers:ReducersMapObject<S,A>):Reducer<S,A>;/** 根据 Reducer Map 返回 全局 State */exporttypeReturnState<ReducerMap>={[keyinkeyofReducerMap]:ReducerMap[key]extends(state:any,action:any)=>inferR?R:any};exporttypeGlobalState=ReturnState<typ...
functionfoo(arg:unknown){if(typeofarg==="string"){// We know this is a string now.console.log(arg.toUpperCase());}} In this example, we checked whetherargwas astring. TypeScript recognized thetypeof arg === "string"check, which it considered a type guard, and was able to determine...
🗺️Road map Features that are planned: Promise support. Something likeassertOrReject<Type>(object)will eitherresolve(object)orreject(error). Optimize the generated conditions. Things likefalse || "key" === "key"can be simplified. Might be more interesting to publish a different library that...
If your package has typings specified using the types or typings key in its package.json, the npm registry will display that the package has available bindings like so: If you still can't find the typings, just look for any ".d.ts" files in the package and manually include them with ...
ExecuteRun Build Task(⇧⌘B(Windows, LinuxCtrl+Shift+B)) from the globalTerminalmenu. If you created atsconfig.jsonfile in the earlier section, this should present the following picker: Select thetsc: buildentry. This will produce aHelloWorld.jsandHelloWorld.js.mapfile in the workspace. ...