expandingList: Fast expanding list.

In curtisalexander/CRAmisc: Curtis Miscellaneous

Description

expandingList is a fast implementation of a list that can be dynamically appended to and turned into a standard R list.

Usage

expandingList(capacity = 10, envir = emptyenv())

Arguments

capacity	Initial list capacity or length.
envir	Environment.

Details

expandingList is a closure that enables modification in place. It serves as an object in R.

The code is copied from Jan Kanis at http://stackoverflow.com/a/32870310.

Value

A closure named expandingList with functions

• expandingList$double.size doubles the size of the list

• expandingList$add adds an element to the list

• expandingList$as.list converts the expandingList into a standard R list

Examples

g <- expandingList(5)  ## expandingList of length 5

for (i in 1:10) g$add(i)  ## append to list without explicitly expanding

identical(1:10, unlist(g$as.list()))  ## TRUE

curtisalexander/CRAmisc documentation built on May 14, 2019, 12:52 p.m.