react app

react-app/node_modules/lodash/object/merge.js

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+var baseMerge = require('../internal/baseMerge'),
+    createAssigner = require('../internal/createAssigner');
+
+/**
+ * Recursively merges own enumerable properties of the source object(s), that
+ * don't resolve to `undefined` into the destination object. Subsequent sources
+ * overwrite property assignments of previous sources. If `customizer` is
+ * provided it's invoked to produce the merged values of the destination and
+ * source properties. If `customizer` returns `undefined` merging is handled
+ * by the method instead. The `customizer` is bound to `thisArg` and invoked
+ * with five arguments: (objectValue, sourceValue, key, object, source).
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @param {*} [thisArg] The `this` binding of `customizer`.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var users = {
+ *   'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
+ * };
+ *
+ * var ages = {
+ *   'data': [{ 'age': 36 }, { 'age': 40 }]
+ * };
+ *
+ * _.merge(users, ages);
+ * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
+ *
+ * // using a customizer callback
+ * var object = {
+ *   'fruits': ['apple'],
+ *   'vegetables': ['beet']
+ * };
+ *
+ * var other = {
+ *   'fruits': ['banana'],
+ *   'vegetables': ['carrot']
+ * };
+ *
+ * _.merge(object, other, function(a, b) {
+ *   if (_.isArray(a)) {
+ *     return a.concat(b);
+ *   }
+ * });
+ * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
+ */
+var merge = createAssigner(baseMerge);
+
+module.exports = merge;