is_list: Check if a value is a list

In assertions: Simple Assertions for Beautiful and Customisable Error Messages

Check if a value is a list

Description

This function checks if a value is a list. By default, definition of a 'list' excludes data.frames in spite of them technically being lists. This behaviour can be changed by setting include_dataframes = TRUE

Usage

is_list(x, include_dataframes = FALSE)

Arguments

x	A value to check.
include_dataframes	A logical indicating whether data_frames should be considered vectors. Default is FALSE.

Value

A logical scalar indicating whether x is a list.

Examples

if(interactive()){
is_list(list(1, 2)) # TRUE
is_list(c(1, 2, 3)) # FALSE
is_list(data.frame()) # FALSE
is_list(data.frame(), include_dataframes = TRUE) # TRUE
}

assertions documentation built on June 7, 2023, 6:03 p.m.