汽车市场报移动版

callback); // ThunkreadFile var readFileThunk = Thunk(fileName);readFileThunk(callback); var Thunk = function ( fileName ) { return function ( callback ) { return fs.readFile(fileName， reject ) {fs.readFile(fileName， c] }) GeneratorJavaScriptasyncGeneratorGenerator Generator async function * createAsyncIterable ( syncIterable ) { for ( const elem of syncIterable) { yield elem; }} await yield* yield* async function * gen1 () { yield a ; yield b ; return 2 ;} async function * gen2 () { const result = yield * gen1();} gen2result2 Generatorfor await...ofyield* ( async function () { for await ( const x of gen2()) { console .log(x); }})(); // a // b 。