Defaults-package: Create Global Function Defaults
In joshuaulrich/Defaults: Create Global Function Defaults

Description Details Note Author(s) Examples

Set, Get, and Import Global Function Defaults

Package:	Defaults
Type:	Package
Version:	2.0-0
Date:	2014-11-23
LazyLoad:	yes
License:	GPL 2 or later

Index:

useDefaults             DEFUNCT: Enable Global Default Check by Function
unDefaults              DEFUNCT: Disable Global Default Check by Function

getDefaults             Show Global Defaults List by Function
setDefaults             Create Global Defaults List by Function
unsetDefaults           Remove All Global Defaults by Function

importDefaults          Import Global Default Argument Values

Defaults makes the use of globally specified defaults, on a per-function basis, available to all functions written in R.

Through the use of importDefaults which can be hard coded into a function by the function author, or dynamically enabled for any visible function through useDefaults, a user can now override the author specified defaults as returned by formals by a call to setDefaults.

It is important to note that only exported functions may have defaults set, which should not be an issue, as they are the only user callable functions.

A big thank you to John Chambers and Dirk Eddelbuettel who pointed out my mishandling of functions with namespaces calling internal non-exported functions. A new implementation of useDefaults now handles this correctly.

Jeffrey A. Ryan

Maintainer: Joshua M. Ulrich <josh.m.ulrich@gmail.com>

formals(sd)                       # what _can_ be set
try(sd(c(1:10,NA)),silent=TRUE)   # fails

#useDefaults(sd)                  # DEFUNCT as of 2.0-0
setDefaults(sd, na.rm=TRUE) 
getDefaults(sd)                   # what _has_ been set

sd(c(1:10,NA))                    # works!

unsetDefaults(sd, confirm=FALSE)  # removes previously set default
#unDefaults(sd)                   # DEFUNCT as of 2.0-0