08-27-周三_17-09-29

node_modules/lodash/lang/isArguments.js

@@ -0,0 +1,34 @@
+var isArrayLike = require('../internal/isArrayLike'),
+    isObjectLike = require('../internal/isObjectLike');
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/** Native method references. */
+var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/**
+ * Checks if `value` is classified as an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  return isObjectLike(value) && isArrayLike(value) &&
+    hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
+}
+
+module.exports = isArguments;