cassidoo_dec_15_2025.js

const rotate = ([ head, ...tail]) => [...tail, head];
const explode = (num, acc = []) => 
    num === 0 ? acc 
    : explode(num - 1, [num, ...acc])
    ; 
const build = (num, input, lines = []) => 
    num === 0 ? lines 
    : build(num - 1, rotate(input), [...lines, input])
    ;

const latinSquare = n => build(n, explode(n));


latinSquare(1);
latinSquare(2);
latinSquare(4);