Sadly, this monad can't stop you from doing dangerous stuff in the first place, like iterating over the output of ls: http://mywiki.wooledge.org/ParsingLs http

Sadly, this monad can't stop you from doing dangerous stuff in the first place, like iterating over the output of ls: http://mywiki.wooledge.org/ParsingLs http://mywiki.wooledge.org/ParsingLs