I'm looking forward to meeting you on July 4th at "Solving Iteration Problems with purrr"!
You only need two things for the tutorial: your laptop with R and some packages installed (see below), and the tutorial slides (
http://bit.ly/purrr-slides).
Required packages:
install.packages("tidyverse") # install.packages("devtools") devtools::install_github("jennybc/repurrrsive")
While not necessary for the tutorial, you may find it useful to see all the materials (including some code solutions) after the tutorial at
https://github.com/cwickham/purrr-tutorial