Modify a List with Another List

A faster version of utils::modifyList().

Usage

modify_list(x, val, keep.null = FALSE)

Arguments

x

A nested list to traverse.

Lists are traversed recursively. Non-list objects are treated as leaves. Data frames are not traversed and are treated as leaf values.

val

A named list whose components modify x.

keep.null

Logical. If TRUE, NULL values in val are kept. If FALSE, NULL values remove corresponding components from x.

Value

A modified list.

Examples

# \donttest{
x <- list(
  a = 1,
  b = list(
    x = 1,
    y = list(i = 1, j = 2)
  )
)

val <- list(
  b = list(
    y = list(j = 99, k = 100)
  ),
  c = 3
)

modify_list(x, val)
#> $a
#> [1] 1
#> 
#> $b
#> $b$x
#> [1] 1
#> 
#> $b$y
#> $b$y$i
#> [1] 1
#> 
#> $b$y$j
#> [1] 99
#> 
#> $b$y$k
#> [1] 100
#> 
#> 
#> 
#> $c
#> [1] 3
#> 
# }