[newbie] read row from file into vector

E.g., for a file such that

$ head -n 2 ~/data/foo.csv | tail -n 1
5718,0.3,0.47,0,0,0,0,0,0,0,0,0.08,0.37,0,0,0.83,1.55,0,0,0,0,0,0,0,0,0,0.00,2.48,2.33,0.17,0,0,0,0,0,0,0.00,10.69,0.18,0,0,0,0

I'd like to be able to populate a vector 'v' s.t.
v[1]=5718, ... v[43]=0

x <- read.csv("foo.csv", nrow=1)
x <- as.numeric(x[1,])  # convert to numeric vector

Look into connection objects, which let you open a file or other
readable sort of thing and read it piece by piece.