RGS's solution for Problem 3, Phase 2 of 2020 APL competition (see https://mathspp.com/blog/2020-apl-competition for my thoughts on it)

P3Phase2_2020.dyalog

PastTasksBlast ← {
    ⍝ Function to scrape Dyalog's webpage for the URLs of past year's competition problem statements.
    ⍝ Monadic function expecting a character vector. 
    ⍝ Assumes HttpCommand is loaded.
    ⍝ Returns a vector of character vectors.
    r ← #.HttpCommand.Get ⍵
    r.HttpStatus≠200: 0⍴⊂,' '
    base ← ⊃('<base +href="(.*?)"' ⎕S '\1') r.Data
    ('href="(.*?[.]pdf)"' ⎕S (base,'\1')) r.Data
}