predicates-property: Property predicates

In egnha/rong: Functional Input Validation

Description

Property predicates

Usage

chk_empty(x)

chk_not_empty(x)

chk_singleton(x)

chk_not_na(x)

chk_without_na(x)

chk_named(x)

chk_has_name(x, nm)

chk_has_names(x, nms)

chk_has_length(x, n)

chk_has_attr(x, which)

chk_has_attrs(x, which)

chk_inherits(x, what)

Arguments

x	Object to test.
nm, nms	Name(s).
n	Length.
which	Object attribute(s).
what	Class name.

See Also

Set predicates, chk_null(), chk_not_null()

Examples

f <- function(x, y) NULL
foo <- firmly(f, "x, y are not disjoint" := chk_empty(intersect(x, y)))
foo(letters[1:3], letters[4:5])
## Not run: 
foo(letters[1:3], letters[3:5])
## End(Not run)

egnha/rong documentation built on May 7, 2019, 9:48 p.m.