2021-2: Index-Of Modified
Write a function that behaves like the APL index-of function R←X⍳Y except that it returns 0 instead of 1+≢X for elements of Y not found in X.
Examples:
'DYALOG' (your_function) 'APL'
3 0 4
(5 5⍴⎕A) (your_function) ↑'UVWXY' 'FGHIJ' 'XYZZY'
5 2 0
your_function ←
Solutions
