There is a certain stage in your application development process, where you need to prevent visitors from accessing the staging or the beta version of the app. To prevent unwanted access, a very basic HTTP authentication system should be added. Such a thing in Rails is extremely easy to add. This post is focused on authenticating access to all application parts.
When you want to protect objects from being changed inside the methods you send them, Ruby offers some methods to preserve that original objects will not get altered in method calls. These methods are:
clone which are very similar with two differences.
--version are command line switches that interact with the Ruby interpreter by instructing the output of Ruby version information. Although both can be used in the same way there is a small difference between them.
In Ruby, there are three ways of negating conditions. The first one is the
not keyword. The second one is with the negating
! (the bang operator of negation). The third and more natural sounding way of negating is the
unless keyword. The keyword
unless, express the exact same semantics as
if not (expression) and