Resolving Promises Sequentially: Kefir.js version

_.js

// https://hackernoon.com/functional-javascript-resolving-promises-sequentially-7aac18c4431e
// Kefir.js version.
// Just a demo.
var ids = [1, 2, 3, 4];
var thenables = ids.map(i => {
  let thenable = fetch(`https://httpbin.org/anything?id=${i}`)
    .then(r => r.json())
    .then(obj => obj.args.id);
  return Kefir.fromPromise(thenable);
})
Kefir.concat(thenables).log();