| modifyList {utils} | R Documentation |
Modifies a possibly nested list recursively by changing a subset of elements at each level to match a second list.
modifyList(x, val)
x |
a named list, possibly empty. |
val |
a named list with components to replace corresponding
components in x. |
A modified version of x, with the modifications determined as
follows (here, list elements are identified by their names). Elements
in val which are missing from x are added to x.
For elements that are common to both but are not both lists
themselves, the component in x is replaced by the one in
val. For common elements that are both lists, x[[name]]
is replaced by modifyList(x[[name]], val[[name]]).
Deepayan Sarkar Deepayan.Sarkar@R-project.org
foo <- list(a = 1, b = list(c = "a", d = FALSE)) bar <- modifyList(foo, list(e = 2, b = list(d = TRUE))) str(foo) str(bar)