key_missing

is.key_missing

<p>A <code>key_missing</code> object represents a missing key.</p>

Fast implementation of a key-value store. Environments are commonly
used as key-value stores, but every time a new key is used, it is added to
R's global symbol table, causing a small amount of memory leakage. This can
be problematic in cases where many different keys are used. Fastmap avoids
this memory leak issue by implementing the map using data structures in C++.

Winston Chang

fastmap

Fast Implementation of a Key-Value Store

RStudio 

Tessil 

key_missing function

A missing key object — key_missing

A missing key object

key_missing: A missing key object

Description

Usage

Arguments