Ruby is not just a programming language, but an entire philosophy about programming. It makes programming fun, productive, and rewarding. Most programs consist of code that needs to be organized into functions. And so most Ruby programs consist of classes and modules containing useful functions for interacting with the real world, operating on text, working with objects, creating GUIs, doing system administration tasks, building web applications… you name it. Ruby is at its heart a toolkit for accessing existing libraries like OpenSSL and providing something like Visual Basic style syntactic sugar to make working with them fun.
A Ruby Gem is a package that contains code and executables. A Ruby Gem package allows developers to bundle up the code into a single package that can be installed through one process. Gem is great for shell scripting, system administration, and application scripting. You can easily open a local or remote file on the command line. gem goes beyond simply splitting lines of files; it does word splitting too. And you can check to see if two words are in the same group made of delimited words.
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