This is a more advanced technique that might not be available in all regex implementations. Ruby’s regular expression engine is able to do this, so let’s see how to take advantage of that. Look ahead lets us peek and see if there is a specific match before or after. Example: is the...
In fact, I never took time to formally learn regexes. As soon as I understood what they were capable of, I printed acheat sheet, taped it to the side of my computer, and referred to it when trying out regexes. You'd be surprised how often a regex can come up in a regular workday...
OWASP Ruby on Rails Cheat Sheet Ultimate Guide to Rack::Attack Awesome Ruby Security Gems ActiveRecord Annotate— Add a comment summarizing the current schema to the top or bottom of each of your ActiveRecord models, fixtures, tests and specs, factory_girl factories, routes.rb file, etc. ...
Next, we modify our regular expression to /world$/, which denotes that we need to match the word world from the end so that a successful match is made.Important noteFor further information on regular expressions in Ruby, refer to http://www.tutorialspoint.com/ruby/ruby_regular_expressions....
Hint: I don't think it's possible to do this without a regular expression. If you've been following this book linearly, then you may not know about regexes. They're a way to match patterns of text – such as, any string that has more than five consecutive vowels –rather than just...