is.empty: Empty Value

In Aypak/dbhelpers: Helper Functions for Common Database Operations

Empty Value

Description

Rails-inspired helper that checks if vector values are "empty", i.e. if it's: NULL, zero-length, NA, NaN, FALSE, an empty string or 0. Note that unlike its native R is.<something> sibling functions, is.empty is vectorised (hence the "values").

Usage

is.empty(x, trim = TRUE, ...)

Arguments

x	an object to check its emptiness
trim	trim whitespace? (TRUE by default)
...	additional arguments for sapply

Examples

## Not run: 
is.empty(NULL) # [1] TRUE
is.empty(c()) # [1] TRUE
is.empty(NA) # [1] TRUE
is.empty(NaN) # [1] TRUE
is.empty("") # [1] TRUE
is.empty(0) # [1] TRUE
is.empty(0.00) # [1] TRUE
is.empty("    ") # [1] TRUE
is.empty("foobar") # [1] FALSE
is.empty("    ", trim = FALSE) # [1] FALSE
# is.empty is vectorised!
all(is.empty(rep("", 10))) # [1] TRUE
all(is.empty(matrix(NA, 10, 10))) # [1] TRUE

## End(Not run)

Aypak/dbhelpers documentation built on Jan. 25, 2024, 9:03 p.m.