Re: [racket-users] File Ports / Writing to a file

[Matthias Felleisen]

Now that is doubly weird: 

When I copy your expression to DrRacket and omit the #lang line, DrRacket warns 
me with 
a big fat red warning in the status line: 

 unsaved editor:3:0: Module Language: only a module expression is allowed, 
either #lang  
 or (module   ...)  in: (define out (open-output-file 
"some-file”))

When I run the program I get an even fatter warning: 

Welcome to DrRacket, version 6.5.0.3--2016-04-18(-/f) [3m].
Language: Determine language from source.
. Module Language: only a module expression is allowed, either
#lang 
 or
(module   ...)
 in: (define out (open-output-file "some-file"))

What version of DrRacket are you using that does not warn you? (We need to 
chase down the bug and fix it.) 




> On Apr 20, 2016, at 5:45 PM, George Mitwasi  wrote:
> 
> That did the trick. DrRacket didn't warn me and I've never needed #lang 
> racket before. The more you know. Thanks again.
> 
> - George
> 
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Re: [racket-users] File Ports / Writing to a file

[George Mitwasi]

That did the trick. DrRacket didn't warn me and I've never needed #lang racket 
before. The more you know. Thanks again.

- George

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Re: [racket-users] File Ports / Writing to a file

[Jon Zeppieri]

On Wed, Apr 20, 2016 at 5:03 PM, George Mitwasi 
wrote:

> On Wednesday, April 20, 2016 at 3:09:53 PM UTC-4, Jon Zeppieri wrote:
> > Maybe you're using one of the teaching languages instead of Racket
> proper? In the "Language" menu, if you select "Choose Language..." you'll
> see a dialog. It should tell you what language you're using.
> >
>
> Interesting. The default language is set to "The Racket Language" which
> surprisingly doesn't work. I tested my code with the other languages and
> R5RS was the winner. Thanks you sir!
>
>

That is odd. The code should certainly work in the Racket language. (The
documentation you cited is for Racket.) Maybe you don't have a `#lang` line
in your definitions window? If you're writing in Racket, the first line of
your program should be:

#lang racket

or (if you want to start with a smaller language):

#lang racket/base

If you omit the #lang line, it won't work. However, DrRacket will actually
tell you that, so you're probably experiencing some different problem.
Unfortunately, I don't know what it is. I *do* know that the sample code
you posted should work in either racket or racket/base.

-Jon

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Re: [racket-users] File Ports / Writing to a file

[George Mitwasi]

On Wednesday, April 20, 2016 at 3:09:53 PM UTC-4, Jon Zeppieri wrote:
> Maybe you're using one of the teaching languages instead of Racket proper? In 
> the "Language" menu, if you select "Choose Language..." you'll see a dialog. 
> It should tell you what language you're using.
> 
> 
> -Jon
> 
> 
> 
> 
> On Wed, Apr 20, 2016 at 3:05 PM, George Mitwasi  wrote:
> There's a good chance this is a quick fix and that I've overlooked something.
> 
> 
> 
> My goal is to simply write output to a text file directly from DrRacket. I've 
> read through the documentation 
> (https://docs.racket-lang.org/reference/file-ports.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._open-input-file%29%29)
>  and am receiving errors with basic expressions like (define out 
> (open-output-file some-file)). Racket doesn't recognize the expression.
> 
> 
> 
> Am I missing a library (doesn't seem to be the case)? Are there some settings 
> that I need change?
> 
> 
> 
> Appreciate the help!
> 
> 
> 
> - George
> 
> 
> 
> --
> 
> You received this message because you are subscribed to the Google Groups 
> "Racket Users" group.
> 
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> 
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Interesting. The default language is set to "The Racket Language" which 
surprisingly doesn't work. I tested my code with the other languages and R5RS 
was the winner. Thanks you sir!

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Re: [racket-users] File Ports / Writing to a file

[Jon Zeppieri]

Maybe you're using one of the teaching languages instead of Racket proper?
In the "Language" menu, if you select "Choose Language..." you'll see a
dialog. It should tell you what language you're using.

-Jon


On Wed, Apr 20, 2016 at 3:05 PM, George Mitwasi 
wrote:

> There's a good chance this is a quick fix and that I've overlooked
> something.
>
> My goal is to simply write output to a text file directly from DrRacket.
> I've read through the documentation (
> https://docs.racket-lang.org/reference/file-ports.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._open-input-file%29%29)
> and am receiving errors with basic expressions like (define out
> (open-output-file some-file)). Racket doesn't recognize the expression.
>
> Am I missing a library (doesn't seem to be the case)? Are there some
> settings that I need change?
>
> Appreciate the help!
>
> - George
>
> --
> You received this message because you are subscribed to the Google Groups
> "Racket Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to racket-users+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>

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[racket-users] File Ports / Writing to a file

[George Mitwasi]

There's a good chance this is a quick fix and that I've overlooked something.

My goal is to simply write output to a text file directly from DrRacket. I've 
read through the documentation 
(https://docs.racket-lang.org/reference/file-ports.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._open-input-file%29%29)
 and am receiving errors with basic expressions like (define out 
(open-output-file some-file)). Racket doesn't recognize the expression.

Am I missing a library (doesn't seem to be the case)? Are there some settings 
that I need change?

Appreciate the help!

- George

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