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    • Java Data Types

      Java Data Types

      Data types in the Java programming language are basically divided into two groups – primitive data types and object references. A primitive data type is a basic building block and has full built-in support. Many other languages also support composite data types, which are build on a combination of primitive data types and may or

    • How to Enable JavaScript

      How to Enable JavaScript

      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

    • Type Conversion – Basic to Class Type

      Type Conversion – Basic to Class Type

      The conversion from basic to user defined data types can be done using constructors. Consider the following constructor: .cf { font-family: Lucida Console; font-size: 9pt; color: black; background: white; } .cl { margin: 0px; } .cb1 { color: green; } .cb2 { color: blue; } .cb3 { color: maroon; }   String :: String(char *a)

    • Depth First Search Algorithm

      Depth First Search Algorithm

      A DFS algorithm, as the name implies, is used to search deeper in the graph, whenever possible. The edges are explored, out of the most recently discovered vertex v that still has unexplored edges leaving it. When all of v's edges have been explored, the search backtracks to explore edges leaving the vertex from which

    • Java Loops – For, While, and Do

      Java Loops – For, While, and Do

      Java supports three types of loops: For, While, and Do. The Java For Loop The Java for loop is a looping construct which continually executes a block of statements over range of values. Java for Loop Syntax The syntax of a for loop in Java is: for (initialization; termination; increment) { statement } Example Java

    • Display Messages using Flashdata in CodeIgniter

      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

    • Random Number Vulnerability

      Random Number Vulnerability

      Computers are deterministic and are therefore predictable. Computers cannot, in and of themselves, generate truly random numbers. In the absence of outside input, computers can only create pseudo-random numbers.  In the words of John Von Neumann, “Anyone attempting to produce random numbers by purely arithmetic means is, of course, in a state of sin.” A

    • Deleting an Element from a Linear Linked List

      Deleting an Element from a Linear Linked List

      To delete an element from the list, first the pointers are set properly and then the memory occupied by the node to be deleted is deallocated (freed). This tutorial covers the deletion of a node from the following three positions: At the beginning of the list At the end of the list After a given

    • Constructors that Allocate Memory Dynamically

      Constructors that Allocate Memory Dynamically

      Constructors can be used to initialize member objects as well as allocate memory. This can allow an object to use only that amount of memory that is required immediately. This memory allocation at run-time is also known as dynamic memory allocation. The new operator is used for this purpose. Sample Program The program below shows

    • How to Sign a Java Applet

      How to Sign a Java Applet

      Java applets are designed to run in a restricted environment known as Sandbox. This confinement helps avoid malicious activities and breach of security from intentionally harmful applets. Therefore, an applet cannot access or communicate with any outside-the-sandbox resource unless granted permission by the user. The trustworthiness of an applet is showcased by signing it with

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