JavaScript is the most widely used client-side scripting language. Almost all websites these days make use of JavaScript directly or via 3rd-party frameworks like JQuery, Prototype, Bootstrap, MooTools, YahooGUI, etc. JavaScript is mostly used for advance web functionality like validations, animation, Ajax-based calling, making flexible interfaces, etc. Therefore, it is important to make sure that …
A Java object is basically a set of data, data structures, and methods combined together to form a single entity. An object is an instance of class. Therefore, a class is said to be a blueprint of an object. Every object instantiated from a class will contain its own copy of member variables and member …
The constructor handles the task of converting basic types to class types very well. But you cannot use constructors for converting class types to basic data types. Instead, you can define an overloaded casting operator that can be used to convert a class data type into a basic data type. The general form of an …
Flashdata is a functionality in the CodeIgniter framework that lets you make required data available for the next server request. It makes use of session, but unlike normal session behavior, the passed data is available only for the next server request and is automatically cleared thereafter. Therefore, Flashdata can be very useful in displaying notifications …
Inserting an Element To insert an element in the list, the first task is to allocate memory for a new node, assign the element to be inserted to the info field of the node, and then the new node is placed at the appropriate position by adjusting appropriate pointers. Insertion in the list can take …
Computer users sometimes need to uninstall Java, for various reasons. In case of upgrading Java, you needn’t remove the previous version of Java. Instead, you can simply run the executable of the newer Java version and the upgrade will automatically happen. However if you wish to uninstall Java, below are the methods for different platforms. …
A constructor plays a vital role in initializing an object. An important note, while using constructors during inheritance, is that, as long as a base class constructor does not take any arguments, the derived class need not have a constructor function. However, if a base class contains a constructor with one or more arguments, then …
Binary operators can be overloaded in a similar manner as unary operators. We should note the following features of an operator function for a binary operator: It receives only one class type argument explicitly, in case of a member function. For a friend function, two class types are received as arguments. It returns a class …
There are two kinds of exceptions, namely, synchronous exceptions and asynchronous exceptions. Errors such as “out-of-range index” and “over-flow” belong to the synchronous type exceptions. The errors that are caused by events beyond the control of the program (such as keyboard interrupts) are called asynchronous exceptions. The proposed exception handling mechanism in C++ is designed …
The javascript:void(0) error is fairly unique, in that it is one of the few computer-based errors that can be encountered by users of any operating system. The error is thrown on web browsers with the end-user surfs to websites that are not fully compatible with the version of Internet browser being used or have a …