Dyalog ’18 Videos, Week 2
Each week until early January, we will be releasing a selection of recordings of presentations from Dyalog’18, which was held in Belfast at the end of October 2018. Last week we kicked off with the opening keynote talks and the prize ceremony and acceptance speech by the winner of our annual problem-solving competition. Just under […]
Diane’s Lasagne Problem
Making Lasagne Participants in the SA2 Performance Tuning workshop at the Dyalog ’18 User Meeting were encouraged to bring their own problems for the group to work on. Diane Hymas of ExxonMobil brought a good one. The one-liner computation is as follows: lasagne0 ← {groups {+⌿⍵}⌸ amts ×[⎕io] spices[inds;]} where n ← 8e5 spices ← […]
Welcome to the Dyalog ’18 Videos!
Three weeks have gone by since we waved goodbye to the last Dyalog ’18 delegates in Belfast. We’ve had time to catch up on sleep, half of us have had colds and recovered from them. Jason Rivers and Richard Park have started mixing and improving the audio and video recordings, and we are ready to […]
Tolerated Comparison, Part 1
Warning: The formula for “tolerated” comparison in this post is not correct for actual floating-point numbers. Do not use it! The follow-up post discusses how to compute the required value precisely in the presence of floating-point error. Tolerant comparison is an important feature in making APL usable in the real world. But it’s also a […]
