At the very least, you should save your result in a variable so you
can go back and inspect it if it displays oddly. (And see if a.i.TEXT
looks anything like a.i.COPIEDFROMDISPLAY).
That said, the expression you originally posted:
<@(a.{~?&256)"_1 @ ?&256 ]10
gave me 10 boxes each with a random deal of characters, for a total
sequence of 1381 characters in the ten boxes.
--
Raul
On Thu, Jan 26, 2012 at 4:28 PM, Tirrell, Jordan (Consultant)
<jtirr...@thomasnet.com> wrote:
> That seems like a likely explanation. It definitely wasn't in the
> clipboard though (I had opened the script as a reference in a separate
> tab but I hadn't even looked at it yet, and the part of the script that
> the gtk terminal reproduced was several pages down).
>
> Since it gave me 302 chars and I was generating boxes of at most 255
> chars, I suppose this is the only possible culprit. Maybe I should
> generally avoid displaying random sequences of characters in gtk if
> there is this risk.
>
> Thanks,
> Jordan
>
> -----Original Message-----
> From: programming-boun...@jsoftware.com
> [mailto:programming-boun...@jsoftware.com] On Behalf Of Raul Miller
> Sent: Thursday, January 26, 2012 4:17 PM
> To: Programming forum
> Subject: Re: [Jprogramming] Roll gave me "random" characters directly
> from a script I had open
>
> You might have generated an escape sequence which pasted content from
> the clipboard, or something of that character.
>
> I do not know what the gtk terminal region is capable of.
>
> --
> Raul
>
> On Thu, Jan 26, 2012 at 4:10 PM, Tirrell, Jordan (Consultant)
> <jtirr...@thomasnet.com> wrote:
>> I was using roll to generate some random varchar data in jgtk.
>> Specifically, the line I executed was
>>
>>
>>
>> <@(a.{~?&256)"_1 @ ?&256 ]10
>>
>>
>>
>> I was very surprised to see output that included a run of 302 chars
>> that is a direct quote from a script I had open (but had not run).
>>
>>
>>
>> I know some pseudorandom generators do things like read system memory,
>
>> but the vocab says J uses the Mersenne Twister algorithm by default,
>> which I think shouldn't behave like this.
>>
>>
>>
>> Could this be some weird GTK display glitch? I was simultaneously
>> experiencing the bug where it can't properly draw boxes.
>>
>>
>>
>> Has anyone else seen this behavior? Unfortunately it's probably next
>> to impossible to duplicate.
>>
>>
>>
>> Jordan
>>
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