react app

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

@@ -0,0 +1,54 @@
+var baseForOwn = require('../internal/baseForOwn'),
+    createFindKey = require('../internal/createFindKey');
+
+/**
+ * This method is like `_.find` except that it returns the key of the first
+ * element `predicate` returns truthy for instead of the element itself.
+ *
+ * If a property name is provided for `predicate` the created `_.property`
+ * style callback returns the property value of the given element.
+ *
+ * If a value is also provided for `thisArg` the created `_.matchesProperty`
+ * style callback returns `true` for elements that have a matching property
+ * value, else `false`.
+ *
+ * If an object is provided for `predicate` the created `_.matches` style
+ * callback returns `true` for elements that have the properties of the given
+ * object, else `false`.
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to search.
+ * @param {Function|Object|string} [predicate=_.identity] The function invoked
+ *  per iteration.
+ * @param {*} [thisArg] The `this` binding of `predicate`.
+ * @returns {string|undefined} Returns the key of the matched element, else `undefined`.
+ * @example
+ *
+ * var users = {
+ *   'barney':  { 'age': 36, 'active': true },
+ *   'fred':    { 'age': 40, 'active': false },
+ *   'pebbles': { 'age': 1,  'active': true }
+ * };
+ *
+ * _.findKey(users, function(chr) {
+ *   return chr.age < 40;
+ * });
+ * // => 'barney' (iteration order is not guaranteed)
+ *
+ * // using the `_.matches` callback shorthand
+ * _.findKey(users, { 'age': 1, 'active': true });
+ * // => 'pebbles'
+ *
+ * // using the `_.matchesProperty` callback shorthand
+ * _.findKey(users, 'active', false);
+ * // => 'fred'
+ *
+ * // using the `_.property` callback shorthand
+ * _.findKey(users, 'active');
+ * // => 'barney'
+ */
+var findKey = createFindKey(baseForOwn);
+
+module.exports = findKey;