R: Does an environment have or see bindings?

env_has {rlang} | R Documentation

## Does an environment have or see bindings?

### Description

`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`).

### Usage

    env_has(env = caller_env(), nms, inherit = FALSE)

### Arguments

`env` | An environment.
`nms` | A character vector containing the names of the bindings to remove.
`inherit` | Whether to look for bindings in the parent environments.

### Value

A named logical vector as long as `nms`.

### Examples

    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)

[Package rlang version 0.4.5 Index]