react app

react-app/node_modules/lodash/math/sum.js

@@ -0,0 +1,50 @@
+var arraySum = require('../internal/arraySum'),
+    baseCallback = require('../internal/baseCallback'),
+    baseSum = require('../internal/baseSum'),
+    isArray = require('../lang/isArray'),
+    isIterateeCall = require('../internal/isIterateeCall'),
+    toIterable = require('../internal/toIterable');
+
+/**
+ * Gets the sum of the values in `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @category Math
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [iteratee] The function invoked per iteration.
+ * @param {*} [thisArg] The `this` binding of `iteratee`.
+ * @returns {number} Returns the sum.
+ * @example
+ *
+ * _.sum([4, 6]);
+ * // => 10
+ *
+ * _.sum({ 'a': 4, 'b': 6 });
+ * // => 10
+ *
+ * var objects = [
+ *   { 'n': 4 },
+ *   { 'n': 6 }
+ * ];
+ *
+ * _.sum(objects, function(object) {
+ *   return object.n;
+ * });
+ * // => 10
+ *
+ * // using the `_.property` callback shorthand
+ * _.sum(objects, 'n');
+ * // => 10
+ */
+function sum(collection, iteratee, thisArg) {
+  if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+    iteratee = undefined;
+  }
+  iteratee = baseCallback(iteratee, thisArg, 3);
+  return iteratee.length == 1
+    ? arraySum(isArray(collection) ? collection : toIterable(collection), iteratee)
+    : baseSum(collection, iteratee);
+}
+
+module.exports = sum;