If you’re happen to be software engineer or developer, you’ll know how tough it is to setup development environment on any machine. Many libraries will be required, nice IDE needed, environment variables needs to be added and more. But that’s just setup part. Even after writing a code snippet, it needs to be compiled with lot of options and then executable built. Now run the executable and the results will be out. Lot of work to do. If a large project is not being built and just some small code snippets needs to be tested, this whole exercise can consume lot of productive time. Finally imagine this for different languages like C, C++ and Java. To spare this lot of work and directly jump to the rapid execution of code you can use simplistic online compiler CodeTwist.com . It supports C, C++ and Java language compilation and execution online. Best part is, it’s free and doesn’t require login or sign-up. (more…)

CodeMirror is an open-source JavaScript library that provides an in-browser code editor. It is customizable with CSS theming support and rich programming API. CodeMirror supports numerous program modes which supports programming languages like C, C++, C#, D, and Java; scripting languages including JavaScript, Ruby, Shell, Python, VBScript, and Perl; markup languages such as HTML, XML, Markdown, Cascading Stylesheet, and reStructuredText; and miscellaneous modes like diff. CodeMirror can be embedded in the major desktop web browsers including Mozilla Firefox, Microsoft Internet Explorer, Apple Safari, and Google Chrome.  (more…)

 Stackoverflow is an online Q&A system where programmers and developers from all levels of experience can read, ask and answer questions related to the field of programming. Stack Overflow is a collaborative online community that requires no monthly membership and is not littered with spam. The site is totally user-driven and is frequented as a simple resource to read questions and answers involving programming, source code, software tools, careers, software algorithms, etc. If you are looking to create a similar site for your business or organization, try installing and running Coordino on your website.

This software platform is built as a Stack Overflow clone and is completely open-source and free for the general public to use. Installation and site administration can be quick and simple if you are using the latest updates of MySQL, Apache and PHP. Its easy and speedy installation and set up process is perhaps one of its best features. Moderators can control posts, create spam filters and give out user permissions with out any hassles.  (more…)

It’s difficult enough to keep up with the latest trends in the world of web development without having to remember the many new HTML5 tags in current usage. However, coding proper HTML5 is more important than ever thanks to the rapid and widespread adoption of the standard around the Internet. When composing posts for articles and comments online, it helps to have the ability to format your content so that it’ll display properly. That’s where Wysihtml5 comes into the equation.

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Follow the series “C++ By Examples” for all the C++ tutorials.

One basic fundamental of C++ is encapsulation. It means bundling data and interface. Major idea behind encapsulation is data hiding. Only providing interfaces to access data outside the class implementation. This is done through access specifiers public, protected and private. You must be knowing that private members of a class can’t be accessed outside that class. And the biggest evaders of private access are friend function and friend class. Yes the fundamental notion of data hiding is being broken wide open by friend specifier. (more…)

Follow the series “C++ By Examples” for all the C++ tutorials.

Exceptions is a way to handle run time errors arise during the execution of program. There are multiple types of exceptions. That includes bad_alloc, bad_cast, bad_typeid, logic_error, domain_error, invalid_argument, out_of_range, runtime_error, range_error, overflow_error, underflow_error and bad_exception. I listed all exceptions here on purpose. Because to find exception types again, you don’t need to wade through c++ source! And for enthusiasts, these exception types are defined in /usr/include/c++/4.4/bits/functexcept.h file. Let’s get back to the topic. I assume, basic usage of exceptions known to you. In this article I’ll show example on how-to write your own exception class which derives from the standard exception class ( Source at /usr/include/c++/4.4/exception).  (more…)

Follow the series “C++ By Examples” for all the C++ tutorials.

You must be aware of polymorphism in C++. It is achieved by declaring virtual functions. I won’t go into details of how to do that. But today we’ll see one particular dangerous side effect of polymorphism. I’ll show when you use array of objects having virtual functions might crash. This is due to array subscripts are calculated on the bases of sizeof operation. See below code for illustration of the problem. We have Base class having ctor, dtor and virtual function. The Derived class contains ctor, dtor, overridden virtual function and one integer data member.  (more…)

Follow the series “C++ By Examples” for all the C++ tutorials.

Static keyword in C++ is used with functions and variables. The methods and variable defined static are not attached with objects but class itself. A very good analogy I read somewhere. Consider class as factory of cars. Each car is individual object and have defined properties (variables) and methods (functions). But how many cars are produced in that factory? Cars (objects) don’t have knowledge of it. Total number of cars produced in that factory is static variable which is attached to the factory (class) itself.  (more…)

There are numerous books available to learn C++ theories and fundamentals. To shape these fundamentals in working examples, I’ve started this series of “C++ By Examples“. This series is intended for the people who are advancing from beginner to expert level. So don’t expect too many granular level theoretical explanations of the examples used. Each future article will cover any of C++ basic fundamentals, design patterns, data structures, STL, multithreading, socket programming etc. I’ll try to cover as many examples as possible to craft, in my ever shrinking schedule.

I encourage readers of these articles to submit their own tutorials and working examples to help the fellow C++ programmers. You can use any code repositories to post your tutorial and let me know. I’ll add link to that tutorial in this article. Or you can submit raw code and I’ll post an article here on goospos.com. The larger goal is to provide single point where people can find out C++ examples and tutorials. (more…)

Developers get into tricky situations while programming. Some syntax problem or any specific feature about Java, there are lots of confusions and doubts which we encounter. Best way is to ask community alike. This time, we have collected best Java communities and forums where you can post your doubts and errors, find resources, ask questions and get them answered by other java developers. These resources are authenticated and popular among Java developers. Have a look at these top Java forums.

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