@rak1507 ah its not. im just happy

:)

      strides←{×\1,⌽1↓⍴⍵}
      strides 3 4 5 6⍴⍳23
1 6 30 120

does strides show the distance between 2 elements in the same location, on different axis?

^ im trying to understand that

is there a place i can get a string of all the apl symbols

@PyGamer0 archive.vector.org.uk/art10501160 this is a more APL related take on it. may be easier to understand.

scroll to the strided repr part

thanks

> offset: the position in data where element [0;0;...;0] is located

does it mean the offset is the position in data where the first element of the array is located?

yes

@Razetime fwiw, ngn (the author of that article) later abandoned the strided array representation in ngn/apl

@dzaima .....

how did i not notice the author lol

and why did he abandon the strided array representation?

i think i understand how it works

@PyGamer0 It doesn't give you much - there's O(1) transposing & reversing & drop/take. But if you want to be cache-friendly, you'd have to do a block-based transpose on any operation acting on a transposed stride array anyway, and things like monadic , or reshape get less efficient & more compilcated to implement

oh

@dzaima how does your APL implementation store its arrays?

just a flat array of items in ravel order

along with an array of the shape (and an extra field of the product of the shape, aka total element count, but that's mostly just an optimization)

oh