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Map Over a Tree

Source: R/flatten.R
map_tree.Rd

Apply a function to each leaf of a (possibly nested) list, preserving the tree structure. Equivalent to flattening .x with flatten(), applying .f to each leaf, and reassembling with unflatten().

Usage

map_tree(.x, .f, ...)

Arguments

.x

(any)
A leaf or a (nested) list of leaves.

.f

(function)
Function to apply to each leaf of .x.

...

Additional arguments passed to .f.

Value

An object with the same nesting structure as .x, where each leaf is the result of .f(leaf, ...).

See also

flatten(), build_tree(), unflatten(), await()

Examples

map_tree(list(a = 1, b = list(c = 2, d = 3)), \(x) x + 1)
#> $a
#> [1] 2
#> 
#> $b
#> $b$c
#> [1] 3
#> 
#> $b$d
#> [1] 4
#> 
#>