calebboyd / aceink

Async things that are useful

aceink

Useful async tools.

• createLock
  • a simple counting sempahore
• createDeferred
  • simple deferred promise
• q
  • a concurrent work queue
• each, map
  • optionally concurrent iteration functions
• gowait
  • convert a promise or promise returning function to [error,result] tuples
• delay
  • delay ms, optionally resolve an argument
• noop, identity, once
  • Other useful language functions

Get it on npm: npm install aceink

See the generated documentation here

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Example (queue)

import { q } from 'aceink'

const { ready, add, empty } = q(10)

function fetchQux(bar) {
  return fetch(`https://example.com/${bar}`)
}

for (const foo of Array(100).keys()) {
  await ready()
  add(fetchQux, foo)
}
return empty()

Example (gowait)

import { gowait, delay } from 'aceink'

const [err, value] = await gowait(delay(100, 42))
console.log(value) //42