is_pairlist

is_node

<ul>
<li><code>is_pairlist()</code> checks that <code>x</code> has type <code>pairlist</code> or <code>NULL</code>.
<code>NULL</code> is treated as a pairlist because it is the terminating
node of pairlists and an empty pairlist is thus the <code>NULL</code>
object itself.</li>
<li><code>is_node()</code> checks that <code>x</code> has type <code>pairlist</code>.</li>
</ul>In other words, <code>is_pairlist()</code> tests for the data structure while
<code>is_node()</code> tests for the internal type.

A toolbox for working with base types, core R features
like the condition system, and core 'Tidyverse' features like tidy
evaluation.

Lionel Henry

rlang

Functions for Base Types and Core R and 'Tidyverse' Features

Hadley Wickham

RStudio 

is_pairlist function

Is object a node or pairlist? — is_pairlist

Is object a node or pairlist?

is_pairlist: Is object a node or pairlist?

Description

Usage

Arguments

See Also