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

Async versions of various highly composable transducers, reducers and iterators

import { ensureReduced, reduced } from "@thi.ng/transducers/reduced";
import { compR } from "./compr.js";
import { iterator } from "./iterator.js";
function take(n, src) {
  return src ? iterator(take(n), src) : (rfn) => {
    const reduce = rfn[2];
    let remaining = n;
    return compR(
      rfn,
      async (acc, x) => --remaining > 0 ? reduce(acc, x) : remaining === 0 ? ensureReduced(reduce(acc, x)) : reduced(acc)
    );
  };
}
export {
  take
};