*apply()
nchar()
paste()
paste0()
sprintf()
substr()
tolower()
toupper()
grep()
grepl()
regexpr()
gregexpr()
sub()
gsub()
regexec()
strsplit()
ifelse()
repeat
while
for
readr
dplyr
%>%
filter()
arrange()
select()
mutate()
transmute()
summarise()
group_by()
plot()