Bump to v4.0.0.

internal/hashGet.js

@@ -0,0 +1,32 @@
+define(['./nativeCreate'], function(nativeCreate) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** Used to stand-in for `undefined` hash values. */
+  var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+  /** Used for built-in method references. */
+  var objectProto = Object.prototype;
+
+  /** Used to check objects for own properties. */
+  var hasOwnProperty = objectProto.hasOwnProperty;
+
+  /**
+   * Gets the hash value for `key`.
+   *
+   * @private
+   * @param {Object} hash The hash to query.
+   * @param {string} key The key of the value to get.
+   * @returns {*} Returns the entry value.
+   */
+  function hashGet(hash, key) {
+    if (nativeCreate) {
+      var result = hash[key];
+      return result === HASH_UNDEFINED ? undefined : result;
+    }
+    return hasOwnProperty.call(hash, key) ? hash[key] : undefined;
+  }
+
+  return hashGet;
+});