is_falsy: Is an object FALSY?

In gaborcsardi/falsy: Define Truthy and Falsy Values

Description

Everything that is FALSE is also falsy. Everything that is TRUE, is also truthy. Other things are either falsy, or truthy, see the details below.

Usage

is_falsy(object)

Arguments

object

The object.

Details

Falsy objects are:

• NULL

• FALSE

• 0L, integer zero value.

• 0, real zero value.

• 0+0i, complex zero value.

• "", character scalar that is the empty string.

• 00, one byte raw vector with zero value.

• Empty vectors. I.e. logical(), integer(), double(), complex(), character() and raw().

• Empty list.

• Object from the try-error class.

Everything else is truthy.

Value

Logical scalar.

Examples

## NULL is falsy
is_falsy(NULL)

## So is the empty string
is_falsy("")

## But the zero string is not
is_falsy("0")

## Clasess are truthy
is_falsy(factor())

## Errors reported by try() are falsy
is_falsy(try(a + "string", silent = TRUE))

gaborcsardi/falsy documentation built on May 16, 2019, 4:09 p.m.