Writing an application really is the start of your problems! Once in production, you need to monitor and maintain it, ensure that it stays secure and fix bugs.

Is RSpec failing when you try to test a script with RSpec via the system command? Here, for the benefit of any googlers who who can’t get their ruby script working properly, is a possible fix to your problem!

A few more notes about changes coming in Ruby 2.3

Tony Hoare came up will Null references in 1965, and later called it a billion-dollar mistake. There are some languages today where null values are not allowed, but ruby isn’t one of them.

Ruby’s Self

When you write ruby code, many times, the context in which your code is executed matters. This context will contain an assumption as to the default Object methods are being called on, self . Within a class definition, this is generally the class itself. Within an instance method definition, it is the instance of that class, etc.

Ruby ships with an interactive shell, or REPL (Read-Eval-Print Loop) called irb. It’s pretty handy for quick ruby evaluations, or running rails console commands.