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Check for paths from from to to

Usage

check_parents(parent_lookup, from, to, prev = NULL)

Arguments

parent_lookup

A list of vectors

from

character

to

character

prev

Should always be null when first called

Value

A list of paths or null if no path is found

Examples

parent_lookup <- list(M = "Am", Y = c("M", "Ay"), A = NULL, Am = "A", Ay = "A")
check_parents(parent_lookup, "A", "Y")
#> $M
#> $M$Am
#> [1] "A"  "Am" "M"  "Y" 
#> 
#> 
#> $Ay
#> [1] "A"  "Ay" "Y" 
#>