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...
A quick reference guide for Ruby on Rails, containing the default directory structure, predefined variables, methods, reserved words and regular expression syntax.Download the Ruby on Rails Cheat Sheet 5 Pages Click Here To Visit This Cheat Sheet Created By DaveChild https://aloneonahill.com ...
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....
Metamagic— a simple Ruby on Rails plugin for creating meta tags. It supports regular meta tags, OpenGraph (Facebook), Twitter Cards, and custom tags. Better Errors— replaces the standard Rails error page with a much better and more useful error page. It is also usable outside of Rails...
Hint:I don't think it's possible to do this without aregular 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 liter...