Status of Cadence Documentation , cdsFinder, isDir

In these days, i often experience situations, where documented
cadence functions do not actually exist.
I found the function isDir to check for the presence of a directory,
but it does not exist.

Whats its replacement ?

rds

 

Strange

$ skill

t

 

my error:

i wrote

if((isDir(".")) then println("hallo") )

*Error* eval: not a function - isDir(".")

too much brackets