more work

node_modules/lodash/internal/arraySum.js

@@ -0,0 +1,18 @@
+/**
+ * A specialized version of `_.sum` for arrays without support for iteratees.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @returns {number} Returns the sum.
+ */
+function arraySum(array) {
+  var length = array.length,
+      result = 0;
+
+  while (length--) {
+    result += +array[length] || 0;
+  }
+  return result;
+}
+
+module.exports = arraySum;