Class "attrData"
A container class to manage generic attributes. Supports named attributes with default values with methods for vectorized access.
Objects can be created by calls of the form new("attrData", defaults).
The defaults argument should be a named list containing the
initial attribute names and default values.
data:Where custom attribute data is stored
defaults:A named list of known attribute names and defualt values.
signature(self = "attrData", x = "character", attr = "character"): ...
signature(self = "attrData", x = "character", attr = "missing"): ...
signature(self = "attrData", x = "character", attr = "character"): ...
signature(self = "attrData", attr = "character", value = "ANY"): ...
signature(self = "attrData", attr = "missing", value = "list"): ...
signature(self = "attrData", attr = "missing"): ...
signature(self = "attrData", attr = "character"): ...
signature(.Object = "attrData"): ...
return the names of the stored attributes
set the names of the stored attributes
signature(self="attrData",
x="character", value="NULL"): Remove the data associated with
the key specified by x.
Seth Falcon
defaultProps <- list(weight=1, color="blue", friends=c("Bob", "Alice"))
adat <- new("attrData", defaults=defaultProps)
## Get all defaults
attrDefaults(adat)
## Or get only a specific attribute
attrDefaults(adat, attr="color")
## Update default weight
attrDefaults(adat, attr="weight") <- 500
## Add new attribute
attrDefaults(adat, attr="length") <- 0
## Asking for the attributes of an element you haven't customized
## returns the defaults
attrDataItem(adat, x=c("n1", "n2"), attr="length")
## You can customize values
attrDataItem(adat, x=c("n1", "n2"), attr="length") <- 5
## What keys have been customized?
names(adat)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.