Comment by account-5

Has to be the APL implementation [0] purely due to how small and arcane it is:

    life ← {⊃1 ⍵ ∨.∧ 3 4 = +/ +⌿ ¯1 0 1 ∘.⊖ ¯1 0 1 ⌽¨ ⊂⍵}

The video runs you through it, even if it doesn't make it any clearer for non-apl'ers.

[0] https://aplwiki.com/wiki/Conway%27s_Game_of_Life