pnpm/lib/node_modules/most/src/source/fromIterable.js

Fast, disk space efficient package manager

/** @license MIT License (c) copyright 2010-2016 original author or authors */
/** @author Brian Cavalier */
/** @author John Hann */

import Stream from '../Stream'
import { getIterator } from '../iterable'
import PropagateTask from '../scheduler/PropagateTask'

export function fromIterable (iterable) {
  return new Stream(new IterableSource(iterable))
}

function IterableSource (iterable) {
  this.iterable = iterable
}

IterableSource.prototype.run = function (sink, scheduler) {
  return scheduler.asap(new PropagateTask(runProducer, getIterator(this.iterable), sink))
}

function runProducer (t, iterator, sink) {
  var r = iterator.next()

  while (!r.done && this.active) {
    sink.event(t, r.value)
    r = iterator.next()
  }

  sink.end(t, r.value)
}