@shanyue/promise-utils/example/demo.js

Userful promise utils, include map, filter, retry and sleep

const promiseMap = require('..')

const addOne = async n => {
  if (typeof n === 'function') {
    return n()
  }
  return n
}

const list = [
  Promise.resolve(3),
  () => Promise.reject(4),   // reject
  Promise.resolve(5),
  6,
  7,
  8
]

// => 'error', 4
// promiseMap(list, x => addOne(x), { concurrency: 3 })
//   .then(o => { console.log(o) })
//   .catch(e => { console.error('error', e) })

//[ { status: 'fulfilled', value: 4 },
//  { status: 'rejected', reason: 5 },
//  { status: 'fulfilled', value: 6 },
//  { status: 'fulfilled', value: 7 } ]
//  { status: 'fulfilled', value: 8 },
//  { status: 'fulfilled', value: 9 } ]
promiseMap(list, x => addOne(x), { concurrency: 1, settled: true })
  .then(o => { console.log(o) })
  .catch(o => { console.error('error', e) })