Succinct way to summarize different columns with different functions

Question

My question builds on a similar one by imposing an additional constraint that the name of each variable should appear only once.

Consider a data frame

Answer 1

It seems like you can use map2 for this.

map2_dfc( df[v], f, ~.y(.x))

# # A tibble: 1 x 2
#   potentially_long_name_i_dont_want_to_type_twice another_annoyingly_long_name
#                                                                     
# 1                                             5.5                          255