Collect Elements of Sublists
Usage
collect(x, element, default = NULL)
Arguments
- x
a list of lists
- element
name of list element to be collected from each sublist of
x
- default
value to be returned for lists that do not have an element
called element.
Examples
x <- list(
list(a = 1, b = 2),
list(c = 3, a = 4),
list(d = 5, e = 6)
)
collect(x, "a")
#> [1] 1 4
collect(x, "a", default = 99)
#> [1] 1 4 99