2015-4: PDI - Progressive Dyadic Iota
The index-of function X⍳Y returns a simple integer vector that identifies where the major cells of Y are first found in X. If a major cell of Y cannot be found in X, then the corresponding item of the returned array will be 1+≢X.
Example of X⍳Y:
'DYALOG APL' ⍳ 'AAALLLB'
3 3 3 4 4 4 11
Progressive dyadic iota is similar to ⍳ except that it returns the index of subsequent matches in the left argument until they are exhausted. Write a function that implements progressive dyadic iota.
Examples:
'DYALOG APL' (your_function) 'AAALLLB'
3 8 11 4 10 11 11
'' (your_function) 'test' ⍝ should work with empty left argument
1 1 1 1
⍬≡'test' (your_function) '' ⍝ should work with empty right argument
1
your_function ←
Solutions
