One of my long-standing "tricks" for awk is using $NF to print the last field on every line. Since NF represents the number of fields on a line (e.g., 6), $NF represents the value of that last field (e.g., $6). Printing the last field of every line, therefore, might look like this:

MINIX has traditionally been an operating system with an eye toward education. Both versions 1 and 2 of the MINIX system were designed to be useful for students learning about operating systems. The code behind MINIX was small and clean, making it a practical study tool in this complex field. The latest offering of MINIX, version 3, attempts to keep the same principles as the previous versions, but also strives to be more practical as a modern, UNIX-like, operating system.

'dialog' is a utility for building console-based 'front ends' in UNIX like operating systems.

In this brief tutorial I am mentioning the usage of few important basic controls available with this 'dialog' utility and later I have created a very simple front end application in UNIX bash scripting using dialog.

While there are many Web frameworks in the Java™ ecosystem, they all are based, directly or indirectly, on the Servlets infrastructure. The Servlets API provides a host of useful features, including state management through the HttpSession and ServletContext mechanisms, which allows the application to maintain state that persists across multiple user requests. However, some subtle (and largely unwritten) rules govern the use of shared state in Web applications, of which many applications unknowingly fall afoul. The result is that many stateful Web applications have subtle and serious flaws.

For my example, I have provided a palette from which to drag & drop into, or alternatively use the File chooser, to select image files off your local file system. For this example, please select image files only, as I have not built in any filtering or error detection for non-graphical files.

Shell programming is heavily dependent on string processing. The term string is used generically to refer to any sequence of characters; typical examples of strings might be a line of input or a single argument to a command. Users enter responses to prompts, file names are generated, and commands produce output. Recurring throughout this is the need to determine whether a given string conforms to a given pattern; this process is called pattern matching. The shell has a fair amount of built-in pattern matching functionality.

In this article, I show you how to combine the dependency injection of the Spring framework effectively with aspects written using AspectJ 5. I assume you have a basic knowledge of AOP (although if you don't, you'll find some good starting points in the Resources section), so I'll begin my discussion by analyzing the key roles and responsibilities involved in a dependency injection-based solution. From there, I'll show you how to configure singleton aspects via dependency injection.

CGI scripts for processing web forms can be written in any language, even shell scripts. The hardest part is parsing the input from the form.

The input is delivered using one of two methods, GET or POST. The GET method adds the information to the end of the URL, and the web server makes it available to the CGI program in the environment variable, QUERY_STRING. The POST method places it on the program's standard input.

Writing an operating system is something that can not only be interesting (if you're one of those people that get turned on by Int 13....) but it is also a great learning experience. Through creating your own operating system you will learn exactly what goes on behind the scenes, elevating you above the average programmer...

Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular. Find out what eclipse is all about - check out the white paper (requires Acrobat Reader 4.0 or later), read some technical articles, visit the newsgroups, take a look at the projects, and pick up the latest downloads. Don't forget to check out the Eclipse Project FAQ and online documentation.