Now, a challenge/puzzle: write a tacit adverb (lrv) that produces the linear
representation of its input verb (bonus points for a fixed version), for
example,
type lrv
type
type f. lrv
{&(<;._1 '|invalid name|not
defined|noun|adverb|conjunction|verb|unknown')@(2&+)@(4!:0)&(<^:(L. = 0:))
SPOILER ALERT: A Solution is presented below...
Another challenge is to evade the linear representation persistent bug to show
the adverb:
lrv=. (".(0 : 0) -. LF)`:6
(<(<,'4'),<(<(<,'4'),<(<(<,'4'),<(<(<,'4'),<<;._1 ' 0: :.'),<(<,'4'),<(<,'`'),<(
<,'0'),<(<'b.'),<(,'0');_1),<(<,'4'),<(<'`:'),<(,'0');6),<(<,'4'),<(<(<,'4'),<(<
(<,'4'),<(<(<,'4'),<(<(<,'4'),<(<(<,'4'),<(<,'"'),<(,'0');_),<(<,'4'),<(<(<'@:')
,<(<,'<'),<(<,'3'),<(<<;._1 ' 0 0'),(<(<,'&'),<;:',<'),<,']'),<'@:'),<(<,'4'),<(
<,'`'),<(<,'0'),<<(,'0');_),<(<,'4'),<(<'`:'),<(,'0');6),<(<,'4'),<(<(<,'&'),<(<
(,'0');_5),<'}.'),<,'`'),<(<,'4'),<(<'`:'),<(,'0');6)
)
lrv
(((0: :.)(`(b.`_1)))(`:6))(((((("_)(<@:((,'0') ,&<
])@:))(`_))(`:6))(_5&}.`))(`:6))
type lrv
type
type f. lrv
{&(<;._1 '|invalid name|not
defined|noun|adverb|conjunction|verb|unknown')@(2&+)@(4!:0)&(<^:(L. = 0:))
Oh yes, I cheated! I used b. _1 to get the linear representation of the
adverse of the adverse of the input verb. The code of the adverb can be
shorter; most of it is related to (_5&}.) dropping 5 trailing characters (':.
0:') but it illustrates how to tacitly transform a verb into its corresponding
adverb. A direct, non-cheating, version is possible but quite more difficult
(as far as I can see).
________________________________________
From: [email protected] [[email protected]] on
behalf of Dan Bron [[email protected]]
Sent: Monday, February 20, 2012 11:02 AM
To: 'Programming forum'
Subject: Re: [Jprogramming] tacit adverb
> A=: 1 : '0&(;@:u) :: empty'
Can be expressed tacitly as B=: 0&(;@:) (:: empty) . In general, tacit
adverbs are trains of adverbial clauses, so if you want to add another, you
only need to wrap it in parens and tack it on the end.
Though your phrasing 0&(;@:) is very appealing; it seems to "beg for an
argument" more than the vanilla formulation of (0&) (;@:) .
-Dan
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of David Ward Lambert
Sent: Monday, February 20, 2012 10:50 AM
To: programming
Subject: [Jprogramming] tacit adverb
I had
A=: 0&(;@:)
u A y
My u raises an error if y is bad, in which case EMPTY is a reasonable
result. I'd prefer not checking y in each u. What is the tacit
A=: 1 : '0&(;@:u) :: empty'
? Thanks, Dave.
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