This guide is now superseded by more recent efforts at documenting tidy evaluation in a user-friendly way. We now recommend reading:

• The new Programming with dplyr vignette.

• The Using ggplot2 in packages vignette.

We are keeping this bookdown guide online for posterity, but please know that it is missing a lot of advances that make tidy eval more palatable, such as the embracing operator {{ arg }} and glue support for custom names.