The Third Day

Firstly apologies for the lack of a post summarizing yesterday’s lessons I was enjoying a delicious Chinese buffet. Without further hesitation here is again a summary of the techniques and idea that we learnt today (yesterday):

  • Membership and how it differs to finding items using a binary condition approach. 
  • The dyadic use of iota and how this compares to using membership to find items.
  • The rotational features of APL.
  • The use of AND, OR, NAND, NOR and XOR.
  • How to use comma bar and why it is so useful.
  • The idea of having empty vectors and the zero tilde symbol.
  • The symbols used to quickly operate on the first dimension of a variable.
  • We had a brief introduction to direct functions.
  • Compression using the results of binary expressions.
  • Some more formatting using binary.

That is all I can remember at the moment however as I said in an earlier post I am writing up a complete set of notes which I will publish at the end of the course and will include notes on every symbol I learn.

Also after the course I will start publishing some of the programs written during the course with explanations on how we learnt to optimize them.

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