Understanding the “||” OR operator in If conditionals in Ruby

Question

Just briefly, why are the following three lines not identical in their impact?

if @controller.controller_name == \"projects\" || @controller.controller_name          


        

Answer 1

I see a lot of people preferring the include? comparison.

I prefer to use the .in? operator. It is much more succinct. And also more readable, since we don't ask questions to the array, we ask questions to the variable you want to ask: On your case, the controller name.

@controller.controller_name.in? ["projects", "parts"]

Or, even better

@controller.controller_name.in? %w[projects parts]