One vs everything

We recommend this approach [perform each step on each file instead of in a function] because it stops you getting fixated on getting the first file right before moving on to the rest. By considering all of the data when doing tidying and cleaning, you’re more likely to think holistically and end up with a higher quality result.


  • Jon’s preference: Do 1-2 files first, iterate on iteration
  • Book: Do everything on everything