vars_select_helpers: List of selection helpers

Description Usage Format Examples

Description

This list contains all selection helpers exported in tidyselect. It is useful when you want to embed the helpers in your API without having to track addition of new helpers in tidyselect.

Usage

1

Format

An object of class list of length 8.

Examples

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# You can easily embed the helpers by burying them in the scopes of
# input quosures. For this example we need an environment where
# tidyselect is not attached:
local(envir = baseenv(), {
  vars <- c("foo", "bar", "baz")
  helpers <- tidyselect::vars_select_helpers

  my_select <- function(...) {
    quos <- rlang::quos(...)
    quos <- lapply(quos, rlang::env_bury, !!! helpers)

    tidyselect::vars_select(vars, !!! quos)
  }

  # The user can now call my_select() with helpers without having
  # to attach tidyselect:
  my_select(starts_with("b"))
})

tidyverse/tidyselect documentation built on Jan. 6, 2019, 2:04 a.m.