The insidious nature of bugs that you are blind to, means that you can never find it.

I wanted to load a javascript file - but it wasn’t working. Did I:

• install the gem correctly?

• add it to the application.js file - and the stylesheet file as well?

• why is there an error still popping up.

It was then that I realised that the equivalent coffeescript file was also existing. Once I deleted the employees.coffee and left the employees.js file still standing. It magically worked!

Moral of the story

• Take things step by step and test each one independently.

• Make sure you have a good underlying understanding of what you are doing. Because if you have any gaps in your knowledge, then you could be spending a lot of time debugging.