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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { BigSource, Big } from "./big/mod.ts";
/** * Returns a numeric whose value is the sum of `values`. * Throws if this `values` contains a invalid numeric. * @param values */export function sum(values: BigSource[]): string {  if (!values.length) {    return "0";  }  const result = values.reduce(    (previousValue: BigSource, currentValue: BigSource): Big => {      return (previousValue instanceof Big        ? previousValue        : new Big(previousValue)      ).plus(currentValue);    },    0  ) as Big;  return result.toString();}