Extract a single dplyr tbl_df row as a vector

Question

How can one extract a single row from a tbl_df as a vector? Simple subsetting with [] brackets yields a 1-row tbl_df:

library(dplyr)
dat <- as_data_frame(mtcars)

dat[2, ]

Source: local data frame [1 x 11]

    mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
  (dbl) (dbl) (dbl) (dbl) (dbl) (dbl) (dbl) (dbl) (dbl) (dbl) (dbl)
1    21     6   160   110   3.9 2.875 17.02     0     1     4     4

A similar problem to Extract a dplyr tbl column as a vector, but with (I think) some different solutions.

Answer 1

Using the dplyr %>% operator

library(dplyr)
as_tibble(mtcars) %>%
           slice(2) %>% 
           unlist(., use.names=FALSE)

Or we can use c with recursive=TRUE

as_tibble(mtcars) %>%
          slice(2) %>% 
          c(., recursive=TRUE) %>%
          unname

Answer 2

Wouldn't as.numeric(mtcars[2,]) be the simplest answer?