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Using ROR With Latest Tips and Techniques by Jon Caldwell
Ruby expressions would be shocking for the uninitiated or those who are shifting form other programming languages. If you have experience with Perl or Python, then you're in luck for they won't send you packing up and running in fear. The term "regular expression" is used to have a program check if it looks like something else in terms of similar characters or spacing, length or a myriad of other things that you may think of. The table form summarizes all the Ruby expressions and elements. Regular expressions are used for matching certain patterns such that if you'd want to check for a digit you use the d expression or to match a space character, you use the s expression to match a space character.
The caret "^" and the "&" operators are used for matching the beginning of a string, and also for the end of a string shown below:
matching =/[a-e]$/
The script would look for similar letters between "a" and "e" respectively including the end of the string. To search for a letter inside a string:
[A-Z] all uppercase letters
[a-z] all lowercase letters
[0-9] all digits(numbers)
To restrict the range, say to look for only the letters between "a" and "e", you write it as [a-e] combined with the caret operator shown below:
[^A-Z] all other characters except uppercase letters
[^a-z] all other characters except lowercase letters
[^A-Za-z] no letters, whether upper or lower case
Since you are just starting, and you are curious, you can gain a lot from Ruby on Rails. You can basically inscribe your individual cookie-cutter Web 2.0 application a lot vigorously and you can do it in no time compared to other languages or network. Codes and the like really takes up a lot of time, and simple mistakes can make you go crazy. But using Ruby on Rails is actually no pain at all. It is easy to use and saves a lot of time. It will just make you feel so blessed you live in this century, people decades ago would have died for Ruby on Rails.
Codes, codes, codes... There has been a reason why the 1-2 code ages ago were put away, how can you read a message out of only two numbers, 1 and 2? Thanks to technology's non-stop improvisation and development, everything is made easier and produces solutions to problems, faster. This is Rails goal: write less code, get done more in less time. Little framework does much more. And why not opt for Rails? It is integrated with AJAX functions and object-oriented database handling. Most companies trust Rails which means, it is something you can really rely on. So that's why not.
Because of its success, popularity and functionality, Ruby on Rails performs with an extensive variety of web servers and databases. Recommended for web servers would have to be Apache, lighttpd or nginx in place of Mongrel or it can be by means of FastCGI. Meanwhile, for database, the following have been suggested to be utilized: MySQL, PostgreSQL, SQLite, Oracle, SQL Server, DB2 and a lot more of servers that Ruby on Rails support and work well with. There is no limitation or strictly recommended on which operating system to use, but the best to make use of is a 'nix-based one for deployment.
When it comes to infrastructure, Ruby on Rails is all over it. From start-ups to non-profits for venture projects of businesses, Rails can handle it. It is the best tool for almost whichever kind of web application (software collaboration, community, e-commerce, content management, statistics, management, etc). Shopify, Yellow Pages, Backpack, Github and Twitter are only some of web sites that uses Ruby on Rails. These web sites have trusted Ruby on Rails do manage their web applications that is made easy to use for people browsing, customers and people in need of the information provided by the web site.
About the Author
Jon Caldwell is a professional content manager. Much of his articles can be found at http://rubyonrailsprogramming101.com
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