这段代码定义了一个包含数字的Set对象,并输出其内容。 2. 使用 Array.from() 函数将 Set 转换成 Array 接下来,我们可以使用Array.from()方法来将Set转换为数组。代码如下: // 使用 Array.from() 转换 Set 为 ArrayconstmyList:number[]=Array.from(mySet);// 输出转换后的 Arrayconsole.log(myList);//...
returnJSON.stringify(todoList) } todoList=fn(todoList) writeFile<ITodoData[]>(path,todoList) } exportfunctionremove(path:string,fn?:any):string|void{ lettodoList:ITodoData[]=JSON.parse(readFile('todo.json')||'[]') if(!fn){ returnJSON.stringify(todoList) } todoList=fn(todoList) writ...
classAnimal{// 公有,私有,受保护的修饰符protectedAnimalName:string;readonly age:number;statictype:string;private_age:number;// 属性存储器getage():number{returnthis._age;}setage(age:number){this._age=age;}run(){console.log("run",this.AnimalName,this.age);}constructor(theName:string){this....
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */ // "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */ // "rootDirs": [], /* List of root folders whose combined content represents the s...
setSourceInput(e.target.value); }; 这里定义了一个input输入框,当触发onChange事件时,会调用onSourceChange方法,该方法的参数e的类型就是:React.ChangeEvent,而e.target的类型就是EventTarget: 再来看一个例子: questionList.map(item =>(<div key={item.id} ...
So we must build the dependency first to generate the declaration files. TypeScript’s project references feature works the same way, building the set of projects in "topological" dependency order. As an example, if we have two projects called backend and frontend, and they both depend on a...
}returnnames.map(name => {url.searchParams.set("name", name)// ~~~// error!// Property 'searchParams' does not exist on type 'string | URL'.returnurl.toString(); }); } Here, TypeScript decided that it wasn’t "safe" to assume thaturlwasactuallyaURLobject in our callback functi...
In the TypeScript file to debug, set the breakpoints as necessary. Depending on the way you specified your TypeScript file in the run/debug configuration, do one of the following: If you typed the filename explicitly, select the required configuration from the Run widget on the toolbar and...
sourceFile.statements = parseList(ParsingContext.SourceElements, parseStatement); Debug.assert(token() === SyntaxKind.EndOfFileToken); sourceFile.endOfFileToken = addJSDocComment(parseTokenNode() as EndOfFileToken); setExternalModuleIndicator(sourceFile); ...
set fullName(newName: string) { if (passcode && passcode == "Hello TypeScript") { this._fullName = newName; } else { console.log("Error: Unauthorized update of employee!"); } } } let employee = new Employee(); employee.fullName = "Semlinker"; ...