[plt-scheme] suggestions and commendations for exercise 2.21

Making current-directory available at that level contradicts our 
teaching philosophy. If it suits yours, a corresponding teachpack is 1 
line long. -- Matthias


On Mar 31, 2004, at 5:06 PM, Terrence Brannon wrote:

> Matthias Felleisen wrote:
>
>>
>>
>> I have modified convert-file so that it specifies where the file is 
>> expected:
>>
>>> Welcome to DrScheme, version 206.1-cvs15mar2004.
>>> Language: Beginning Student.
>>> Teachpack: /Users/matthias/plt/teachpack/htdp/convert.ss.
>>> > (convert-file "in.dat" f "out.dat")
>>> convert-file: expected <name of existing file in 
>>> /Users/matthias/plt/collects/htdp/Test/> as first argument, given: 
>>> "in.dat"
>>> > (convert-file "convert-in.dat" f "out.dat")
>>
>> ...
>>
>> Is this sufficiently helpful? -- Matthias
>>
>>
> Yes, that would've helped me out quite a bit.
>
> Most helpful would be the availibility of something like ifconfig 
> mentioned
>
>    (current-directory)
>
> But I think the diagnostic error message is a very useful step in the 
> right direction.
>