In some cases, str() does not print the "names" attribute of the object:
u <- structure(c(5, 6), names = c("a", "b"), color = "blue")
str(u)
# atomic [1:2] 5 6
# - attr(*, "color")= chr "blue"
Is it a bug or a design choice?
Originally asked here:
https://stackoverflow.com/q/47185756/6656269