How to convert callback to Promise in Javascript

Issue #416

// @flow

const toPromise = (f: (any) => void) => {
  return new Promise<any>((resolve, reject) => {
    try {
      f((result) => {
        resolve(result)
      })
    } catch (e) {
      reject(e)
    }
  })
}

const videos = await toPromise(callback)

If a function accepts many parameters, we need to curry https://onmyway133.github.io/blog/Curry-in-Swift-and-Javascript/

function curry2(f) {
    return (p1) => {
        return (p2) => {
            return f(p1, p2)
        }
    }
}

const callback = curry2(aFunctionThatAcceptsOptionsAndCallback)(options)
const items = await toPromise(callback)