env_has {rlang} | R Documentation |
env_has()
is a vectorised predicate that queries whether an
environment owns bindings personally (with inherit
set to
FALSE
, the default), or sees them in its own environment or in
any of its parents (with inherit = TRUE
).
env_has(env = caller_env(), nms, inherit = FALSE)
env |
An environment or an object bundling an environment, e.g. a formula, quosure or closure. |
nms |
A character vector containing the names of the bindings to remove. |
inherit |
Whether to look for bindings in the parent environments. |
A logical vector as long as nms
.
parent <- child_env(NULL, foo = "foo") env <- child_env(parent, bar = "bar") # env does not own `foo` but sees it in its parent environment: env_has(env, "foo") env_has(env, "foo", inherit = TRUE)