jQuery Type Testing Functions

• Determine the type of an object
• Useful for optional parameters & validation

Functions:

• $.isArray(array)
• $.isFunction(function) - another way to do this ( if (typeof <functionName> == "function")
• $.isEmptyObject(object)
• $.isPlainObject(object)
• $.isXmlDoc(doc)
• $.isNumeric(number)
• $.isWindow(window)
• $.type(object)

 Return Values:

• boolean
• number
• string
• function
• array
• date
• regexp
• object
• undefined
• null