@thi.ng/transducers-async/cat.js

Async versions of various highly composable transducers, reducers and iterators

import { isReduced } from "@thi.ng/transducers/reduced";
import { compR } from "./compr.js";
const cat = () => (rfn) => {
  const r = rfn[2];
  return compR(rfn, async (acc, x) => {
    if (x != null) {
      for await (let y of x) {
        acc = await r(acc, y);
        if (isReduced(acc)) return acc.deref();
      }
    }
    return acc;
  });
};
export {
  cat
};