@thi.ng/rstream/iterable.js

Reactive streams & subscription primitives for constructing dataflow graphs / pipelines

import { __optsWithID } from "./idgen.js";
import { stream } from "./stream.js";
const fromIterable = (src, opts = {}) => stream(
  (stream2) => {
    const iter = src[Symbol.iterator]();
    const id = setInterval(() => {
      let val;
      if ((val = iter.next()).done) {
        clearInterval(id);
        stream2.closeIn !== "never" && stream2.done();
      } else {
        stream2.next(val.value);
      }
    }, opts.delay || 0);
    return () => clearInterval(id);
  },
  __optsWithID("iterable", opts)
);
const fromIterableSync = (src, opts) => stream(
  (stream2) => {
    for (const s of src) {
      stream2.next(s);
    }
    stream2.closeIn !== "never" && stream2.done();
  },
  __optsWithID("iterable-sync", opts)
);
export {
  fromIterable,
  fromIterableSync
};