;
> has the desired effect.
>
> -Dan
>
>
> -Original Message-
> From: programming-boun...@forums.jsoftware.com
> [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Ian Clark
> Sent: Tuesday, September 04, 2012 10:01 AM
> To: programm...@jsoftware.com
Ian Clark
Sent: Tuesday, September 04, 2012 10:01 AM
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Self-reference in an explicit definition
Thanks. All is now clear.
The J Dictionary says: "$: denotes the longest verb that contains it."
http://www.jsoftware.com/help/dictio
Thanks. All is now clear.
The J Dictionary says: "$: denotes the longest verb that contains it."
http://www.jsoftware.com/help/dictionary/d212.htm
The essential piece of information I was missing (overlooking?) was:
"...in the current sentence".
On Tue, Sep 4, 2012 at 2:19 PM, Raul Miller wrote
$: refers to the largest containing verb in the current sentence. Explicit
definitions contain sentences.
--
Raul
On Tuesday, September 4, 2012, Ian Clark wrote:
> Let's define a verb: max which can be used either dyadically:
>
>5 max 7
> 7
>
> or monadically:
>
>max 5 7
> 7
>
> Can so
Let's define a verb: max which can be used either dyadically:
5 max 7
7
or monadically:
max 5 7
7
Can somebody explain to me please
(for the purpose of completing
http://www.jsoftware.com/jwiki/Vocabulary/dollarco )
why this works:
max=: $:/ : >.
but this doesn't:
max=: 3 : 0
$:/y
:
x>
$: here means the same thing that pn means (and it would have been
clearer if pn had been used instead of $:
If $: had just been the left verb in the gerund, you would be getting
a domain error from trying to use i. on a complex argument (rec's
arguments would go negative and we put them through %
I was looking through the essay on the wiki about partitions, and I was looking
at the verb pn:
pn =: -/@(+/)@:($:"0)@rec ` (x:@(0&=)) @. (0>:]) M.
rec =: - (-: (*"1) _1 1 +/ 3 * ]) @ (>:@i.@>.@%:@((2%3)&*))
I was a little confused about the way that $: works - does it re-execute the
whole verb
