is.ref: checking (for) references

In ref: References for R

Description

is.ref checks whether an object inherits from class "ref".
exists.ref checks whether an referenced object exists.

Usage

  is.ref(x)
  exists.ref(ref)

Arguments

x	an object that might be a reference
ref	a reference as returned from ref or as.ref

Value

logical scalar

Author(s)

Jens Oehlschl<e4>gel

See Also

ref, exists, inherits, class

Examples

  v <- 1
  good.r <- as.ref(v)
  bad.r <- ref("NonExistingObject")
  is.ref(v)
  is.ref(good.r)
  is.ref(bad.r)
  exists.ref(good.r)
  exists.ref(bad.r)

ref documentation built on May 2, 2019, 6:08 p.m.