What is Rails?

What is Rails?

Rails is a web application development framework written in the Ruby language. It is designed to make programming web applications easier by making assumptions about what every developer needs to get started. It allows you to write less code while accomplishing more than many other languages and frameworks. Experienced Rails developers also report that it makes web application development more fun.

Rails is opinionated software. It makes the assumption that there is a “best” way to do things, and it’s designed to encourage that way – and in some cases to discourage alternatives. If you learn “The Rails Way” you’ll probably discover a tremendous increase in productivity. If you persist in bringing old habits from other languages to your Rails development, and trying to use patterns you learned elsewhere, you may have a less happy experience.

• DRY – “Don’t Repeat Yourself” – suggests that writing the same code over and over again is a bad thing.
• Convention Over Configuration – means that Rails makes assumptions about what you want to do and how you’re going to do it, rather than requiring you to specify every little thing through endless configuration files. Bottom line is "Just follow the convention no need of configuration."
• REST is the best pattern for web applications – organising your application around resources and standard HTTP verbs is the fastest way to go.

http://guides.rubyonrails.org/getting_started.html