mingo/dist/esm/operators/accumulator/lastN.js

MongoDB query language for in-memory objects

import {
  ComputeOptions,
  computeValue
} from "../../core";
import { $push } from "./push";
const $lastN = (collection, expr, options) => {
  const copts = ComputeOptions.init(options);
  const m = collection.length;
  const n = computeValue(copts?.local?.groupId, expr.n, null, copts);
  return $push(
    m <= n ? collection : collection.slice(m - n),
    expr.input,
    options
  );
};
export {
  $lastN
};