Ask and Return True or False from the Terminal

Ask a question and read from the terminal in interactive scenario

Usage

ask_yesno(
  ...,
  end = "",
  level = "INFO",
  error_if_canceled = TRUE,
  use_rs = TRUE,
  ok = "Yes",
  cancel = "No",
  rs_title = "Yes or No:"
)

Arguments

..., end, level: passed to cat2
error_if_canceled: raise error if canceled
use_rs: whether to use rstudioapi if possible
ok: button label for yes
cancel: button label for no
rs_title: message title if 'RStudio' question box pops up.

Value

logical or NULL or raise an error. If "yes" is entered, returns TRUE; if "no" is entered, returns FALSE; if "c" is entered, error_if_canceled=TRUE will result in an error, otherwise return NULL

Details

The prompt string will ask for an yes or no question. Users need to enter "y", "yes" for yes, "n", "no" or no, and "c" for cancel (case-insensitive).

This can only be used in an interactive session.

Examples

if(interactive()){
ask_yesno('Do you know how hard it is to submit an R package and ',
          'pass the CRAN checks?')
ask_yesno('Can I pass the CRAN check this time?')
}