xstream/examples/map-filter-take.js

An extremely intuitive, small, and fast functional reactive stream library for JavaScript

var xs = require('../index').default;

var stream = xs.periodic(1000)
  .take(10)
  .filter(i => i % 2 === 0)
  .map(i => i * i);

function listenerNext(x) {
  console.log(x);
}

stream.addListener({
  next: listenerNext,
  error: err => console.error(err),
  complete: () => console.log('done'),
});