[Jprogramming] Binary representation without #: or #.

[Linda Alvord]

I think you missed the problem.  The definition  why  expects both a left and a right argument.  The original post shows no definition for  x  . So erase any definition of x that might be floating around. 

   why=: 13 :'x + 10*y'/|. 1 2 3 4 5
   erase names 'x'
1
   why
12345

The result has been produced without a value for  x :

   x
|value error: x

There is only one noun that the verb is supplied with in a dyadic definition.  How can it have a result?

Linda

-----Original Message-----
From: programming-bounces at jsoftware.com [mailto:programming-bounces at jsoftware.com] On Behalf Of Raul Miller
Sent: Monday, January 02, 2012 11:28 AM
To: Programming forum
Subject: Re: [Jprogramming] Binary representation without #: or #.

Every explicit verb has an implicit first line:
y=. right argument.

Every dyadic explicit verb has an implicit second line:
x=. left argument

Here, right argument and left argument are meant to represent the
nouns which the verb is supposed to deal with.

The explicitly provided lines would follow the above implicit lines.

--
Raul

On Mon, Jan 2, 2012 at 11:18 AM, Linda Alvord <lindaalvord at verizon.net> wrote:
> Now I have a new problem:
>
>   why=: 13 :'x + 10*y'/|. 1 2 3 4 5
>   erase names 'x'
> 1
>   why
> 12345
>   x
> |value error: x
>
> What is  x  in  why ?
>
> -----Original Message-----
> From: programming-bounces at jsoftware.com
> [mailto:programming-bounces at jsoftware.com] On Behalf Of Aai
> Sent: Monday, January 02, 2012 5:42 AM
> To: Programming forum
> Subject: Re: [Jprogramming] Binary representation without #: or #.
>
>
>
> On 02-01-12 11:21, Linda Alvord wrote:
>> This was a while ago, but how about a simple J version:
>>
>>     brila=: 13 :'([:(++:)/|.)"1 y'
>>     brila
>> ([: (+ +:)/ |.)"1
>>     n=:5 3$   0 0 0 0 0  1 0 1 0 0 1 1 1 0 0
>>     n
>> 0 0 0
>> 0 0 1
>> 0 1 0
>> 0 1 1
>> 1 0 0
>>     brila n
>> 0 1 2 3 4
>>
>> I'm still puzzled by how it works:
>    #. 1 0 1 0 1 0 1
> 85
>
>    13 :'x + 2*y'/ |. 1 0 1 0 1 0 1
> 85
>
> or
>
>    13 :'x + +: y'/ |. 1 0 1 0 1 0 1
> 85
>
>
> Simple J(?)
>
>    13 :'x + +: y'
> [ + [: +: ]
>
> or concise:
>
>   (++:)
>
> Base 10 example:
>
>    13 :'x + 10*y'/ |. 1 2 3 4 5
> 12345
>
>    (+10&*)/ |. 1 2 3 4 5
> 12345
>
>
> --
> Met vriendelijke groet,
> @@i = Arie Groeneveld
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm