vctrs: vec_is_list – R documentation

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vec_is_list

Is the object a list?

Description

vec_is_list() tests if x is considered a list in the vctrs sense. It returns TRUE if:

x is a bare list with no class.
x is a list explicitly inheriting from "list".

Usage

vec_is_list(x)

Arguments

`x`	An object.

Details

Notably, data frames and S3 record style classes like POSIXlt are not considered lists.

Examples

vec_is_list(list())
vec_is_list(list_of(1))

vec_is_list(data.frame())

vctrs

Vector Helpers

v0.3.8

MIT + file LICENSE

Authors

Hadley Wickham [aut], Lionel Henry [aut, cre], Davis Vaughan [aut], data.table team [cph] (Radix sort based on data.table's forder() and their contribution to R's order()), RStudio [cph]

Initial release