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/** * The simple [sum](https://en.wikipedia.org/wiki/Summation) of an array * is the result of adding all numbers together, starting from zero. * * This runs in `O(n)`, linear time, with respect to the length of the array. * * @param {Array<number>} x input * @return {number} sum of all input numbers * @example * sumSimple([1, 2, 3]); // => 6 */function sumSimple(x) {    let value = 0;    for (let i = 0; i < x.length; i++) {        if (typeof x[i] !== "number") {            return NaN;        }        value += x[i];    }    return value;}
export default sumSimple;