Use readr::type_convert

[hadley]

And expose col_types argument

[cjyetman]

Please also expose the na argument of readr::type_convert (or the na.strings argument of utils::type.convert) so that one can correctly parse a table that includes a legitimate "NA" string, e.g.

html_string <- 
"<table>
<tr><td>MM</td><td>Myanmar</td></tr>
<tr><td>NA</td><td>Namibia</td></tr>
<tr><td>NR</td><td>Nauru</td></tr>
</table"

rvest::minimal_html(html_string) %>% 
  rvest::html_node("table") %>% 
  rvest::html_table()
#     X1      X2
# 1   MM Myanmar
# 2 <NA> Namibia
# 3   NR   Nauru

[hadley]

I decided it was too much work for relatively little gain to use readr here, so I just added the na.strings argument.