Thank you as always.
Your spdj is truly more readable than the original APL version!
(comparing how long it took me to understand the meaning)
What do you think about the main theme of the paper? What style of J
code is more readable to you? Is there any "Style and Literacy" like
paper for J?
2007/2/19, Roger Hui <[EMAIL PROTECTED]>:
Various translations going from most literal
to most J-like:
spd=: 4 : 0
((1{f),*/0 2{f) $, 1 0 2|:(f=. x,c%x,1) $, (c=. d+(x|x-0{d=.$y),0){.y
)
spd1=: 4 : 0
(t,x*n) $, 1 0 2|:(x,t,n=.{:$y) $, (x*t=. >.({.$y)%x){.y
)
spd2=: 4 : 0
(t,x*{:$y) $, > |: (x,t)$<"1 (x*t=. >.(#y)%x){.y
)
spd3=: 4 : 0
(t,x*{:$y) $, (|:i.x,t) { (x*t=. >.(#y)%x){.y
)
spd4=: 4 : 0
,./ (x,t) $ (x*t=. >.(#y)%x){.y
)
spdj=: [: ,./ -@>.@(%~#) ]\ ]
spd: literal translation of original APL
spd1: use better names and exploit features
available in some APLs (e.g. SHARP APL)
spd2: bypass having to deal with the # of columns
spd3: another way to bypass the # of columns
spd4: exploit ,./ and $
spdj: most J-like version
What I most dislike about the original APL version
is its lack of a good example. For example, from
3 spd > ;: 'able baker charlie dog echo fred gamma ham india jam ken lambda
michael'
able fred ken
baker gamma lambda
charlieham michael
dog india
echo jam
I would have known immediately what the function
was trying to achieve.
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