react app

react-app/node_modules/lodash/utility/callback.js

@@ -0,0 +1,53 @@
+var baseCallback = require('../internal/baseCallback'),
+    isIterateeCall = require('../internal/isIterateeCall'),
+    isObjectLike = require('../internal/isObjectLike'),
+    matches = require('./matches');
+
+/**
+ * Creates a function that invokes `func` with the `this` binding of `thisArg`
+ * and arguments of the created function. If `func` is a property name the
+ * created callback returns the property value for a given element. If `func`
+ * is an object the created callback returns `true` for elements that contain
+ * the equivalent object properties, otherwise it returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @alias iteratee
+ * @category Utility
+ * @param {*} [func=_.identity] The value to convert to a callback.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
+ * @returns {Function} Returns the callback.
+ * @example
+ *
+ * var users = [
+ *   { 'user': 'barney', 'age': 36 },
+ *   { 'user': 'fred',   'age': 40 }
+ * ];
+ *
+ * // wrap to create custom callback shorthands
+ * _.callback = _.wrap(_.callback, function(callback, func, thisArg) {
+ *   var match = /^(.+?)__([gl]t)(.+)$/.exec(func);
+ *   if (!match) {
+ *     return callback(func, thisArg);
+ *   }
+ *   return function(object) {
+ *     return match[2] == 'gt'
+ *       ? object[match[1]] > match[3]
+ *       : object[match[1]] < match[3];
+ *   };
+ * });
+ *
+ * _.filter(users, 'age__gt36');
+ * // => [{ 'user': 'fred', 'age': 40 }]
+ */
+function callback(func, thisArg, guard) {
+  if (guard && isIterateeCall(func, thisArg, guard)) {
+    thisArg = undefined;
+  }
+  return isObjectLike(func)
+    ? matches(func)
+    : baseCallback(func, thisArg);
+}
+
+module.exports = callback;