The posted article is just a cropped (and possibly plagiarised) copy of the one linked at the end of the Lifehacker one:
http://www.instructables.com/id/Keep-Bananas-Fresh-Longer-sl...
It seems that whoever tried to copy the article didn't read it and forgot to include the steps.
Just as @jeroen has commented, here is a less confusing article giving the same solution: http://lifehacker.com/5967424/keep-bananas-fresh-longer-by-s...