Oh, the use of (current-command-line-arguments) is a terrific idea and a great improvement over what I was trying to do. Thanks for pointing it out.
This brings me to a tangentially related question. I am using Racket v5.1.3. Searching the manuals for current-command-line-arguments leads to the following: | (current-command-line-arguments) | -> (vectorof (and/c string? immutable?)) | | (current-command-line-arguments argv) -> void? | argv : (vectorof (and/c string? immutable?)) | | A parameter that is initialized with command-line arguments | when Racket starts (not including any command-line arguments | that were treated as flags for the system). That's all it says. I understand the first form: it says (current-command-line-arguments) returns the command-line arguments in a vector. I don't understand the second form. What is (current-command-line-arguments argv) supposed to do? -- Rouben On Mon, Aug 20, 2012 at 07:50:00AM +0200, Rüdiger Asche wrote: > > Do you need to run echo.rkt under control of racket? If you compile > it as a standalone, you can use > > (current-command-line-arguments) > > within echo.rkt to access the vector or command line arguments. > > ----- Original Message ----- From: "Rouben Rostamian" > <rostam...@umbc.edu> > To: <users@racket-lang.org> > Sent: Monday, August 20, 2012 12:42 AM > Subject: [racket] Need help with running racket from the command-line > > > >I am having difficulty in interpreting Racket's command-line > >options described in the User Guide. Please help if you can. > > > >I want to do something like this: > > > > racket -t echo.rkt -e '(echo "hi")' > > > >The file echo.rkt (which is given at the end of this message) > >is a module that provides a function "echo" which simply prints > >its argument to the terminal. > > > >I expect the Unix command > > > > racket -t echo.rkt -e '(echo "hi")' > > > >to print "hi" to the terminal and exit. But it doesn't; it complains > >about an unbound identifier. This is Racket v5.1.3, if it matters. > > > >Here is the content of the file echo.rkt: > > > >;; echo.rkt ------------ > > > >#lang racket > > > >(provide echo) > > > >(define (echo x) > > (display x) > > (newline)) > > > >;; end of echo.rkt ----- > > > > > >-- > >Rouben Rostamian ____________________ Racket Users list: http://lists.racket-lang.org/users
