Quicksort in APL Revisited
A message in the Forum inquired on sorting strings in APL with a custom comparison function. First, sorting strings without a custom comparison function obtains with a terse expression: {⍵[⍋↑⍵]} ‘syzygy’ ‘boustrophedon’ ‘kakistocracy’ ‘chthonic’ ┌─────────────┬────────┬────────────┬──────┐ │boustrophedon│chthonic│kakistocracy│syzygy│ └─────────────┴────────┴────────────┴──────┘ Sorting strings with a custom comparison function can also be accomplished succinctly by simple modifications to the Quicksort […]
A message from the CTO
Hello! Further to Morten’s kind words of introduction, I’d like to take this opportunity to introduce myself as the new CTO of Dyalog Ltd. About me I’m a newcomer to APL. When I started working for Dyalog in 2010 I had only seen the Game of Life video, an intriguing but baffling glimpse into a […]
Hacking with APL
Thanks to our dear friend Dr. Ray Polivka, Dan Baronet and I had the opportunity to travel to Vassar College to participate in their Community Hackathon held on 5-6 February 2016. “What’s a hackathon?” you ask? Well, we did too, as we’d never participated in one before. 🙂 According to the Hackathon’s announcement: “CommunityHack is a way to […]
