mingo/esm/operators/accumulator/sum.js

MongoDB query language for in-memory objects

import { isNumber } from "../../util";
import { $push } from "./push";
const $sum = (coll, expr, options) => {
  if (isNumber(expr)) return coll.length * expr;
  const nums = $push(coll, expr, options);
  let res = 0;
  for (let i = 0; i < nums.length; i++) if (isNumber(nums[i])) res += nums[i];
  return res;
};
export {
  $sum
};