It is not clear what constiutues an expression in the definition of
bident and trident. At least if a noun is not an expression in that
sense. /Erling
Den 2017-10-13 kl. 15:19, skrev Erling Hellenäs:
OK. I understood now. Sorry. /Erling
Den 2017-10-13 kl. 15:11, skrev Erling Hellenäs:
Hi all !
http://www.jsoftware.com/help/learning/92.htm
There seems to be a confusion as to what constitutes bidents and
tridents, originating in the dictionary and it's earlier versions:
http://www.jsoftware.com/help/dictionary/dicte.htm
It seems like some rules were named something else and some rules got
named the trident and bident rules, even if all rules were actually
bidents or tridents.
Cheers,
Erling
Den 2017-10-13 kl. 13:29, skrev bill lam:
Then there will a reduction or production according the rule of dyad.
Result of execution of dyad is a noun and put back to stack.
A train may executed as bident or trident, but dyad should never be
executed in 2 steps. See the rule for dyad in page 80. It is the
only page
needed to study to understand J parser. Try give it a serious
reading and
repeat for several times.
On Oct 13, 2017 7:07 PM, "Erling Hellenäs"
<[email protected]> wrote:
No, as I understand it it looks ahead one. I am sure you are right
on that.
And when the lookahead item to the left is not a conjunction what
happens
then? The NOUN VERB NOUN combination is not executed or composed? Or
you
call the NOUN VERB NOUN combination a bident as Raul states? /Erling
Den 2017-10-13 kl. 12:55, skrev bill lam:
Note the AVN instead of CAVN.
If it is a C then the next N would be its argument and executed first
because a conjunction has a higher binding power than a verb, ie J
execution is not necessarily strictly from right to left even if
the total
absence of parentheses. This is my understanding but of course I
may be
wrong.
On Oct 13, 2017 6:36 PM, "Erling Hellenäs" <[email protected]>
wrote:
Hi all!
http://www.jsoftware.com/help/dictionary/dicte.htm
"3. A verb is applied dyadically if possible; that is, if
preceded by a
noun that is not itself the right argument of a conjunction."
"EDGE+AVN NOUN VERB NOUN 2 Dyad"
/Erling
Den 2017-10-13 kl. 11:23, skrev bill lam:
The J parser is unambiguously defined by the online webpage dicte as
pointed by Raul, or page 80 in my previous image. It is quite
simple.
Please state which part you couldn't understand.
I am curious, you seemed to have written a simple version of J
interpreter,
how was it possible without knowing the J execution stack model in
page
80?
On Oct 13, 2017 4:53 PM, "Erling Hellenäs" <[email protected]>
wrote:
Hi all!
As I see it there are two ways to handle a dyadic verb in a
parser. Either
you react on the trident N0 V1 N2 or you partially execute V0 N1.
In this
case the product must be a new monadic verb. This new monadic verb
is then
handled further in the parse process. However, I can not see any verb
results of V0 N1. This means I don't understand how the parser could
execute a dyadic verb(like in explicit J) or how it could compose the
dyadic verb with previous compositions (like in tacit J).
According to my analysis handling N0 V1 N2 as a trident would be
much more
efficient, since the other alternative would be to execute each
verb twice
or compose it for later execution twice.
It seems in J partial execution of dyadic verbs is not possible
since the
monadic form of the verb would then be executed and the left noun
argument
would cause a syntax error.
Maybe Bill or Raul can in clear terms describe how the parser handles
dyadic verb application so that we can put an end to this very
strange
side
discussion?
Cheers,
Erling Hellenäs
Den 2017-10-13 kl. 04:59, skrev Raul Miller:
Or it looks like I was incorrrect, in terms of the thinking that went
behind it.
Even though the noun train would not handled as a trident by the
parser, it looks like Ken had that in mind as a part of the
structure
of the implementation.
Thanks,
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