An empty function. You can use this empty function when you wish to pass around a function that

Check to see if an object is a plain object (created using "{}" or "new Object"). Note:

Finds the elements of an array which satisfy a filter function. The original array is not affected. The

States if the current page, in the user's browser, is being rendered using the W3C

Search for a specified value within an array and return its index (or -1 if not found). The $

Merge the contents of an object onto the jQuery prototype to provide new jQuery instance methods. The

Contains flags for the useragent, read from navigator.userAgent. This property was removed in jQuery 1.9 and is available only through the jQuery.migrate

Execute some JavaScript code globally. This method behaves differently from using a normal JavaScript

Check to see if an object is empty (contains no enumerable properties). As of jQuery 1.4 this method

Return a number representing the current time. The $.now() method is a shorthand for