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Count Leaf Nodes in a Nested List

Source: R/11_list_core.R
list_nleaf.Rd

Count the number of leaf nodes in a nested list.

Usage

list_nleaf(x)

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.

Value

A numeric scalar. Integer when possible, double for very large counts.

See also

Other lstrrr_core: list_delete(), list_depth(), list_get(), list_has(), list_path(), list_set()

Examples

x <- list(a = 1, b = list(c = 2, d = list(e = 3)))
list_nleaf(x)
#> [1] 3

list_nleaf(list())
#> [1] 0