flow like the river

BACK_BACK/node_modules/lodash-es/sum.js

@@ -0,0 +1,24 @@
+import baseSum from './_baseSum.js';
+import identity from './identity.js';
+
+/**
+ * Computes the sum of the values in `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.4.0
+ * @category Math
+ * @param {Array} array The array to iterate over.
+ * @returns {number} Returns the sum.
+ * @example
+ *
+ * _.sum([4, 2, 8, 6]);
+ * // => 20
+ */
+function sum(array) {
+  return (array && array.length)
+    ? baseSum(array, identity)
+    : 0;
+}
+
+export default sum;