Banning the $-sign and brackets needs correcting

[dmonder]

I see two problems in the section titled Banning the $-sign and brackets (https://github.com/matloff/TidyverseSkeptic#case-study--tidys-banning-the--sign-and-brackets).

In the first example, you include an extra assignment in the Tidy version that is not in the base-R version. I would change the Tidy version to this:

loans <- openintro::loans_full_schema %>%
  mutate(bankruptcy = if_else(public_record_bankrupt >= 1, "Yes", "No")) %>%
  filter(annual_income >= 10)

This results in a comparable version to the base-R version.

As for the second example, the Tidy version can be simplified to the following since you are already using the magrittr package. This is only slightly more complicated than the base-R version and not near as complicated as the current example.

x <- c(5,12,13,1)

x %>% extract(. > 8)

[matloff]

The Tidy code in my essay is not mine; it's from the article written by prominent Tidy proponents.

Interesting point about extract(), though arguably a little out of scope,