Bump to v4.0.0.

hasIn.js

@@ -0,0 +1,33 @@
+define(['./internal/baseHasIn', './internal/hasPath'], function(baseHasIn, hasPath) {
+
+  /**
+   * Checks if `path` is a direct or inherited property of `object`.
+   *
+   * @static
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to query.
+   * @param {Array|string} path The path to check.
+   * @returns {boolean} Returns `true` if `path` exists, else `false`.
+   * @example
+   *
+   * var object = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) });
+   *
+   * _.hasIn(object, 'a');
+   * // => true
+   *
+   * _.hasIn(object, 'a.b.c');
+   * // => true
+   *
+   * _.hasIn(object, ['a', 'b', 'c']);
+   * // => true
+   *
+   * _.hasIn(object, 'b');
+   * // => false
+   */
+  function hasIn(object, path) {
+    return hasPath(object, path, baseHasIn);
+  }
+
+  return hasIn;
+});