Replace matches in a list — list_replace

list_replace_all() replaces matches in atomic vectors inside a list with a replacement value. If the list is nested, the function will recursively apply the replacement to all nested lists.

Usage

list_replace_all(list, pattern = "^$", replacement = NULL)

Arguments

list: A list or pairlist object.
pattern: A character string containing a regular expression to be matched in the list.
replacement: An atomic value to replace the matches with.

Value

A list with matches replaced with the replacement value.

Details

If there is a match, but the replacement value is not the same class as the original value, the function will return the replacement value as is.

If the replacement value is the same class as the original value, the function will return a vector with the replacement value in the same position as the match.

Examples

list_replace_all(list(a = "", b = "b", c = list(d = "", e = "e")))
#> $a
#> NULL
#> 
#> $b
#> [1] "b"
#> 
#> $c
#> $c$d
#> NULL
#> 
#> $c$e
#> [1] "e"
#> 
#> 
#> $a # Expected
#> NULL
#>
#> $b
#> [1] "b"
#>
#> $c
#> $c$d
#> NULL
#>
#> $c$e
#> [1] "e"