I clean up in drracket with 80-column wide  ;; --- lines. So there's support 
for the idea. 


On Jul 31, 2010, at 11:44 AM, Neil Van Dyke wrote:

> Robby Findler wrote at 07/31/2010 11:19 AM:
>> 
>> On Sat, Jul 31, 2010 at 10:00 AM, Matthias Felleisen
>> <matth...@ccs.neu.edu> wrote:
>>   
>>> 1. Could drracket limit the width of programs in the teaching language 
>>> world to 80 columns?
>>>     
>> 
>> This one seems doable (I'd probably make the text turn red when it passes 
>> the 80th column or somethign instead of rejecting keystrokes).
>>   
> 
> If it's a visual indicator, I would very much like to have that available as 
> an option in the non-teaching languages as well.  After working on a file in 
> DrRacket for a while, I usually have to clean up the new overly-long lines in 
> Emacs.
> 
> Typical indicators are a gray line in the background after column 79 or 80, 
> or a background color change there, like from white to light gray.
> 
> I'm not sure about red.  Sometimes, rightward drift and a long identifier or 
> literal means you have no practical choice but to violate the 79/80 border.  
> IMHO, border incursion is not quite as grave an offense as some of the other 
> things for which we might want to use red.
> 
> Regarding 79 or 80, 80 is now good for lots of people who previously had to 
> use 79, though probably some people would like the option of 79.  (For a long 
> time, it was 79 for lots of Unix people, first because some terminals would 
> to an automatic newline of some kind on a write in column 80, and then 
> because some tools liked to put adornments in column 80.  Some tools still 
> like to.)  100 also seems a popular max width in some people's 'coding 
> standards'.  MS Visual Studio, for example, lets you set this border to an 
> arbitrary number, IIRC.
> 
> -- 
> http://www.neilvandyke.org/
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