I knew APL is terse and incomprehensible, but seeing Conway's Game of
Life in APL
was mindblowing (link via Hacker News):
life ← { ⊃ 1 ω ∨ . ∧ 3 4 = +/ +⌿ 1 0 ‾1 ∘.θ 1 - ‾1 Φ″ ⊂ ω }
(I think that's close—it was hard to find the right symbols) Yes, that
really does calculate a single generation. To run multiple generations was
one additional line of code:
{} { pic∘ ← '⋅☻'[ω] ◊ _←[]dl ÷8 ◊ life ω } ★≡ RR
I remember years ago at a ham fest I was on the lookout for IBM
keyboards (the only true keyboard, mind you) and I missed picking up an
honest-to-god IBM APL keyboard by just seconds—a friend I was with got to
it before I did (grrrrrrrr, and at $5, it was certainly a steal).
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