Re: [Bug-apl] Print width

[Juergen Sauermann]

Hi Kacper,

I see. I have changed back to the old ⎕PW behavior and made 79 the
default ⎕PW value. SVN version 113.

/// Jürgen

On 01/28/2014 08:55 PM, Kacper Gutowski wrote:
> On 2014-01-28 14:23:01, Juergen Sauermann wrote:
> > that was on purpose because the default ⎕PW is 80 and on some
> > 80 column terminals this causes an extra empty line to be printed.
> If there are terminals like that, wouldn't it be easier to just initialize
> ⎕PW to 79 while keeping relation between this value and way wrapping occurs
> the same as in other systems?  It's a bit annoying when you have some
> pretty-printing functions that read value of ⎕PW to decide how to format
> output.
>
> Anyway, it's not that easy as width being ⎕PW-1.  When printing mixed
> arrays X such that (⎕PW-1)=¯1↑⍴⍕X, i.e. ones that should fill the whole
> line but not wrap, they sometimes get wrapped too.
>
>        ⎕PW←30
>        (⎕PW-1)⍴'X'
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>        10|⍳⎕PW÷2
> 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
>        1,(⎕PW-3)⍴'X'
> 1 XXXXXXXXXXXXXXXXXXXXXXXXXXX
>        1,⍨(⎕PW-3)⍴'X'            ⍝ Last element wrapped for no reason?
> XXXXXXXXXXXXXXXXXXXXXXXXXXX
>        1
>        ⍕1,⍨(⎕PW-3)⍴'X'           ⍝ See? No reason at all.
> XXXXXXXXXXXXXXXXXXXXXXXXXXX 1
>        'X',1,(⎕PW-5)⍴'X'         ⍝ ⋆Two⋆ lines printed.
> X 1 XXXXXXXXXXXXXXXXXXXXXXXXX
>        
>        ⍕'X',1,(⎕PW-5)⍴'X'        ⍝ Single line as expected.
> X 1 XXXXXXXXXXXXXXXXXXXXXXXXX
>
> Especially take a look at the last example.  There is exactly nothing to
> wrap but additional line still appears.
>
> -k