Alternative S4 Constructor
An alternative version of new to create objects based on a list
of values.
new2(class, ...)
class |
Class name to instanciate |
... |
extra arguments from which slot values are extracted by exact matching of names. |
setClass('A', contain='character', representation(x='numeric', y='character'))
# identical behaviour with standard calls
identical(new('A'), new2('A'))
identical(new('A', x=1), new2('A', x=1))
# but if passing that are names not slots
identical(new('A'), new2('A', b=1))
identical(new('A', x=1), new2('A', x=1, b=3))
identical(new('A', x=1), new2('A', x=1, b=3))
# standard `new` would coerce first unnamed argument into parent of 'A' (i.e. 'character')
new('A', list(x=1))
new('A', list(x=1, y='other'))
# `new2` rather use it to initialise the slots it can find in the list
identical(new('A', x=1), new2('A', list(x=1)))
identical(new('A', x=1, y='other'), new2('A', list(x=1, y='other')))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.