Bump to v4.0.0.

functions.js

@@ -0,0 +1,29 @@
+define(['./internal/baseFunctions', './keys'], function(baseFunctions, keys) {
+
+  /**
+   * Creates an array of function property names from own enumerable properties
+   * of `object`.
+   *
+   * @static
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to inspect.
+   * @returns {Array} Returns the new array of property names.
+   * @example
+   *
+   * function Foo() {
+   *   this.a = _.constant('a');
+   *   this.b = _.constant('b');
+   * }
+   *
+   * Foo.prototype.c = _.constant('c');
+   *
+   * _.functions(new Foo);
+   * // => ['a', 'b']
+   */
+  function functions(object) {
+    return object == null ? [] : baseFunctions(object, keys(object));
+  }
+
+  return functions;
+});