Access to the program environment and commmand line arguments.

Print the environment: get-env() { p.fst + "=" + p.snd }).join("\n").print.

Return the arguments that were passed to program itself. Strips off the initial program from the unprocessed command line. i.e. If a program started as:

   > node myprogram.js --flag bla

The arguments list will be ["--flag","bla"].

The unprocessed command line that was used to start this program. On ‘'Node’' the first arguments will often be of the form ["node","interactive.js",...].

Get the environment variables for this program.

Returns the value of an environment variable name. Returns defaultstd/core/default: forall<a> (m : maybe<a>, nothing : a) -> a (= "") if the environment variable was not present.