Ecfun (version 0.3-2)

nchar0: Zero characters or NULL

Description

Returns TRUE if (is.null(x) || (length(x) == 0) || (max(nchar(x)) == 0)).

Usage

nchar0(x, ...)

Value

TRUE if x is either

NULL or max(nchar(x))

== 0. FALSE otherwise.

Arguments

x

a character vector or something that can be coerced to mode character

...

optional arguments to be passed to nchar

Author

Spencer Graves

See Also

nchar

Examples

stopifnot(
all.equal(nchar0(NULL), TRUE)
)

stopifnot(
all.equal(nchar0(character(0)), TRUE)
)

stopifnot(
all.equal(nchar0(character(3)), TRUE)
)

stopifnot(
all.equal(nchar0(c('a', 'c')), FALSE)
)