The APL Orchard

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LdBeth

05:25

aoc day 9 is direct application of +/ and -/

contrast to yesterdays' the problem provide too much useless details

9 hours later…

RubenVerg

14:07

(AOC day 9 spoilers!) I have (≢(+/⊢×⊣!⍨⍳⍤≢⍤⊢)((⊃¨(2∘(-⍨/))_Iterate_(0∧.=⊣)))) for part 1 and very similarly (¯1(+/⊢×⊣!⍨⍳⍤≢⍤⊢)((⊃¨(2∘(-⍨/))_Iterate_(0∧.=⊣)))) for part 2 (iterate is from aplcart)

like it more than doing +/ because it needs no change to work for the second part

(it's the Gregory-Newton interpolation formula)

(probably easier to read as ¯1(+/⊢×!⍨∘(⍳≢))(⊃¨2∘(-⍨/)_Iterate_(0∧.=⊣)))

4 hours later…

Stack Exchange Feeds

17:56

Q: Dyalog APL: How to execute a function regardless of errors?

I have a function with the code (borrowed here https://github.com/mkromberg/websocket-demo) assert 0=⊃res←iConga.Clt''WSHOST WSPORT'http' 100000('X509'(⎕NEW iConga.X509Cert))('Options'iConga.Options.WSAutoUpgrade) wsclt←2⊃res ws_state.cid←wsclt assert 0=⊃res←iConga.SetProp wsclt'WSUpgrade'('/...