Dplyr: Implement view

[hadley]

i.e.

view <- function(x) {
  if (interactive()) {
    View(x)
  }
  invisible(x)
}

Advantages over View():

• Guaranteed to invisibly return x
• Does nothing when not in an interactive context

[hadley]

Consider making it a generic

[mine-cetinkaya-rundel]

"Does nothing when not in an interactive context" will be very useful to avoid issues when it's (mistakenly) used in an R Markdown document

[edgararuiz-zz]

Echo on making it a generic, that way we can get it to work on tbl_sql objects, where we can collect() the top 1,000 records and have it open a data viewer, unlike the list viewer that it opens today if I don't perform collect() first.

[krlmlr]

Should this live in tibble?

[hadley]

I'm not sure - on one hand it seems better because tibble is a lower-level package; but on the other tibble, generally doesn't provide generic verbs.

[krlmlr]

We do have print() and glimpse() in tibble, so view() seems like a good fit.

[hadley]

Well, print() lives in base, but glimpse() is a compelling argument. Let's move this to tibble.

[krlmlr]

Closing in favor of https://github.com/tidyverse/tibble/issues/373.