Re: [Bug-apl] Preventing display of too large arrays

[Juergen Sauermann]

Hi,

maybe some ⎕SYL limit could work. Currently we have such limits on the 
depth of the SI,
on the number of values, and on the number of ravel bytes. This was to 
limit infinite recursion of
user-defined functions. When such a limit is reached then an ATTENTION 
is thrown and you can decide
to continue (→'') or to escape (→) or to change the value for example.

/// Jürgen


On 04/30/2014 04:35 PM, Elias Mårtenson wrote:
> Sometimes, I accidentally make a mistake in interactive mode that 
> causes GNU APL to try to render a very large array to the screen. This 
> can cause the pretty-printer to essentially hang for very long amounts 
> of time, and this operation can't be interrupted. I usually have to 
> kill the APL session, losing the entire workspace.
>
> Would it make sense to have a parameter that controls the largest 
> value that will be displayed in an interactive session. Too large 
> arrays could be displayed using for example the first few rows and 
> some kind of symbol or message indicating that the output has been 
> truncated.
>
> Something like "...remaining rows have been truncated (⍴ = 5837 23)" 
> would be neat.
>
> This could have saved me numerous times.
>
> Regards,
> Elias