what are the packages doing in the first example?

[AlainVagner]

Sorry, not really a R developer, this is probably a stupid question.
On this page, could you please explain quickly what those packages are doing?

library(dplyr)
library(purrr)
library(readxl)
library(stringr)
library(janitor)

I was expecting some explanation, then it did not came ;) Or is it useful to mention loading packages here?

[b-rodrigues]

Calling library(dplyr) makes the functions included in dplyr available in the current session. I don't explain it, because as I mention in the beginning of the book I assume readers are already somewhat familiar with R.

But to be honest, the code of the example is not that important, what's important is the approach 😉

[AlainVagner]

I understand the library call, I was just curious to know what the dplyr library is doing. But yeah, I was lazy, I can search this by myself.