[racket] Getting program options/arguments?

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Thu Sep 16 10:08:06 EDT 2010

It is probably better to use command-line (what Jay pointed to) and,
if you do, you can pass the #:argv argument to like Eli suggests.


On Thu, Sep 16, 2010 at 8:59 AM, Eli Barzilay <eli at barzilay.org> wrote:
> On Sep 16, Matthias Felleisen wrote:
>> If so, to develop the program, open the language dialog in DrRacket
>> (cmd L) and ask for details.  In the text box for "command line
>> arguments ..." enter some strings between the parentheses, like
>> this:
>>   #("hello" "1" "#t")
>> and click OK In the definitions window, enter
>>   #lang racket
>>   (define argv (current-command-line-arguments))
>>   (displayln argv)
>> Click RUN. Look at argv, and it will print the argv vector -- just
>> like in other PLs.
> Quick note: since this can be inconvenient to do if you're playing
> with lots of different command lines, another way to do it is to
> include it in the code:
>   #lang racket
>   (current-command-line-arguments #("hello" "1" "#t"))
>   (define argv (current-command-line-arguments))
>   (displayln argv)
> ... as long as you remember to remove it when you're done.
> --
>          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>                    http://barzilay.org/                   Maze is Life!
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