dply: order columns alphabetically in R

Try this

df %>% select(noquote(order(colnames(df))))

or just

df[,order(colnames(df))]

Update Dec 2021

New versions of dplyr (>= 1.0.7) work without the noquote:

df %>% select(order(colnames(df)))

An alternative way to do this in dplyr is:

iris %>% 
  select(sort(current_vars()))

current_vars() returns column names such that they're sortable, and select() will take the vector of column names.