In "Modifier trains", 'N V1 V0' should yield 'N V1 (V0 y)'. [That 'N' could be
'x'.]
The absence of y, u, and v from the left column requires substantial study by a
new reader, in the absence of a footnote explaining the format.
In "Conjunctions", the second column should show 'x' and 'y'
Note that by going to tacit you have repeated the first search.
It does make a good advert for virtual blocks.
Henry Rich
On 8/26/2022 5:27 PM, Devon McCormick wrote:
I get these timings on J 9.04:
A=. ?1e8#1e3
ts '100 find2 A'
2.4e_6 1536
ts '100 (1{I.@E.) A'
0.19722 8.39853e6
I get these timings on J 9.04:
A=. ?1e8#1e3
ts '100 find2 A'
2.4e_6 1536
ts '100 (1{I.@E.) A'
0.19722 8.39853e6
ts '100 ({.@}.@(I.@E.)) A'
0.200139 8.39866e6
(100 find2 A) -: 100 (1{I.@E.) A
1
find2
([: >: i.~) + [ i.~ ] }.~ [: >: i.~
On Fri, Aug 26, 2022 at 3:53 PM 'Mike Day'
Does that include drop, }. ? I suppose it can, since we only need to move the
pointer to the start... I’ll check on the laptop, once I’ve done my Listener
xwd.
(Last week’s was the quarterly numeric puzzle, an ingenious construction
including among all the digits a few decimal points and
Updating arrays without generating a new copy was introduce in J805 --
https://code.jsoftware.com/wiki/System/ReleaseNotes/J805
So in J701, that approach would indeed be slower (since it's creating
a complete copy of the array).
Also, virtual blocks (which speed up the }. approach) were
These seem simpler and are possibly quicker, at least in J701 on this oldish
iPad:
100 (1{I.@E.) A NB. Fails if there’s no (second) 100 in A
719
100 ({.@}.@(I.@E.)) A NB. Returns 0 in that case
719
Easy to correct for such errors, of course.
I tried
A =. ?100#1000
find2 =: 13 :
i. returns the index of the first occurrence of a value within an array.
So, when implementing an algorithm which needs the index of the second
occurrence of the value within a (large) array, we need to do some
additional work.
let's say that our array is A, the value is V
F=: A i. V NB.
On Fri, Aug 26, 2022 at 9:57 AM chris burke wrote:
> I agree it makes sense to support more hosting repos. The relevant
> pacman code is under https://github.com/jsoftware/base9, in particular
> see gitrepo.ijs.
>
> Perhaps the info in the proposed ~user/config/user-addons.txt would be
> better
I agree it makes sense to support more hosting repos. The relevant
pacman code is under https://github.com/jsoftware/base9, in particular
see gitrepo.ijs.
Perhaps the info in the proposed ~user/config/user-addons.txt would be
better in ~addons/config, either as a new file or extra info in
On Fri, Aug 26, 2022 at 1:22 AM 'Viktor Grigorov' via General
wrote:
> There's bitbucket.org, codeberg.org, gitlab.com, sr.ht, gitea.io, among
> others. (They don't also arguably illegaly feed your code to their commercial
> products.) There can't not exist some way to test whether or not a URI
10 matches
Mail list logo
