2021-3: Multiplicity
Write a function that:
- has a right argument Y which is an integer vector or scalar
- has a left argument X which is also an integer vector or scalar
- finds which elements of Y are multiples of each element of X and returns them as a vector (in the order of X) of vectors (in the order of Y).
💡 Hint: The residue function X|Y and outer product operator X∘.fY might be useful for this problem.
Examples:
⎕←Y←20?20 ⍝ your example may be different
5 7 8 1 12 10 20 16 11 4 2 15 3 18 14 19 13 9 17 6
2 4 7 3 9 (your_function) Y ⍝ using ]Box on
┌─────────────────────────┬────────────┬────┬──────────────┬────┐
│8 12 10 20 16 4 2 18 14 6│8 12 20 16 4│7 14│12 15 3 18 9 6│18 9│
└─────────────────────────┴────────────┴────┴──────────────┴────┘
3 (your_function) ⍳10
┌─────┐
│3 6 9│
└─────┘
6 7 (your_function) 42
┌──┬──┐
│42│42│
└──┴──┘
2 3 5 (your_function) ⍬ ⍝ returns a vector of 3 empty vectors
┌┬┬┐
││││
└┴┴┘
⍬ (your_function) ⍳10 ⍝ returns an empty vector
your_function ←
Solutions
