NB. Exploring Y
Y =: (&({::))(@:])
type<'Y'
+------+
|adverb|
+------+
select=: (<2 3) Y NB.
select
(<2 3)&({::)@:]
type<'select'
+----+
|verb|
+----+
[DATA=: [&.>10 + i.4 7
+--+--+--+--+--+--+--+
|10|11|12|13|14|15|16|
+--+--+--+--+--+--+--+
|17|18|19|20|21|22|23|
+--+--+--+--+--+--+--+
|24|25|26|27|28|29|30|
+--+--+--+--+--+--+--+
|31|32|33|34|35|36|37|
+--+--+--+--+--+--+--+
select DATA
27
4 Y Alpha_j_
E
NB. use Y in a sentence
NB. written with Y
f=: 2503 $ (0 #~ 2 Y) ,~ 1 Y # 0 Y
NB. similar sentence without Y
g=: (2503 $ (0 #~ 2&{::) ,~ 1&{:: # 0&{::) :[:
f
2503 $ (0 #~ 2&({::)@:]) ,~ 1&({::)@:] # 0&({::)@:]
g
(2503 $ (0 #~ 2&({::)) ,~ 1&({::) # 0&({::)) :[:
I'm convinced, 2503 $ (0 #~ 2 Y) ,~ 1 Y # 0 Y
is easier to read, to write, and is generalized to dyadic use.
(A f B) -: (f B) versus (A g B) causes domain error.
On 12/14/2015 07:00 AM, [email protected] wrote:
Date: Mon, 14 Dec 2015 22:45:09 +1100
From: "Ryan Eckbo"<[email protected]>
To: "Pascal Jasmin"<[email protected]>
Subject: Re: [Jprogramming] advent 14
Message-ID:<[email protected]>
I don't understand what Y is, could you explain that?
On 14 Dec 2015, at 17:10, 'Pascal Jasmin' via Programming wrote:
>in =. ". leaf (3 8 _2 { ;:)"1 a =. > cutLF wdclippaste ''
>Y =: (&({::))(@:])
> sentence using Y
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