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| //importar la librería IxJS | |
| const Ix = require('ix'); | |
| //Crea la fuente de datos con una función async generator | |
| async function* arrGen() { | |
| yield 1; | |
| yield 2; | |
| yield 4; | |
| } | |
| //Crea un objeto que IxJS entienda; Async Iterable. | |
| const results = Ix.AsyncIterable.from(arrGen()) | |
| .filter(x => x % 2 === 0) // filtra y devuelve sólo los datos que son pares | |
| .map(x => x * 2); // y el resultado Anterior lo multiplica por 2 | |
| const resultFromIterator = results[Symbol.asyncIterator]() // obtenemos la instancia del iterator | |
| //como son objetos asíncronos utilizamos async await para obtener la respuesta | |
| async function arrReadFromIterator() { | |
| console.log( 'next 4', await resultFromIterator.next() ) | |
| console.log( 'next 8',await resultFromIterator.next() ) | |
| console.log( 'next?', await resultFromIterator.next() ) | |
| } | |
| //llamado de la función asíncrona | |
| arrReadFromIterator() | |
| // next 4 | |
| // {value: 4, done: false} | |
| // next 8 | |
| // {value: 8, done: false} | |
| // next? | |
| // {value: undefined, done: true} |
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