2 * A specialized version of `_.sum` for arrays without support for callback
3 * shorthands and `this` binding..
6 * @param {Array} array The array to iterate over.
7 * @param {Function} iteratee The function invoked per iteration.
8 * @returns {number} Returns the sum.
10 function arraySum(array, iteratee) {
11 var length = array.length,
15 result += +iteratee(array[length]) || 0;
20 module.exports = arraySum;