Clojure koans are exercises meant to initiate you to the mysteries of the Clojure language. By following along the path set before you, you will touch on all the major aspects of the language, from simple datatypes to macros, from tail recursion to Java interoperability.
The Google Annotations Gallery is an exciting new Java open source library that provides a rich set of annotations for developers to express themselves. Do you find the standard Java annotations dry and lackluster? Have you ever resorted to leaving messages to fellow developers with the @Deprecated annotation? Wouldn’t you rather leave a @LOL or @Facepalm instead? If so, then this is the gallery for you.
This document describes the style guide, tag and image conventions we use in documentation comments for Java programs written at Java Software, Sun Microsystems. It does not rehash related material covered elsewhere:
Persistente Objekte und Serialisierung
This page shows common errors that Bash programmers make. The following examples are all flawed in some way
Can you write a command line tool? Maybe you can, but can you write a really good command line tool? This articles covers making a robust command line tool in Python, complete with built-in help menus, error handling, and option handling.
via ZDO.COM – Articles – Creating text mode user interfaces with Perl.