is_there: Check if object exists

In twolodzko/lolplyr: Adapting dplyr for lists-of-lists

Description

Check if object exists

Usage

is_there(x, env = parent.frame())

Arguments

x	object name.
env	an environment.

Examples

lst <- list(
  list(a = 1, b = "a"),
  list(a = 2),
  list(a = 3, b = NULL),
  list(a = 4, b = NA)
)

# show only the entries where "b" was declared

lst %>%
  filter(is_there(b))

twolodzko/lolplyr documentation built on May 14, 2019, 8:22 a.m.