cassidoo_feb_9_2026.js

const swap = (xs, n, i) =>
    xs.fill(
        xs.splice(i+1, 1, n)[0],
        i,
        i+1
    )
;

const chase = (xs, n, i) =>
    i === xs.length - 1
        ? xs
        : chase(
            swap(xs, n, i),
            n,
            ++i
        )
;

const chaseIfN = (xs, n, i) =>
    xs[i] === n
        ? chase(xs, n, i)
        : xs
;
    
const moveNums = (xs, n, i = 0) =>
    i === xs.length ?
        xs :
        moveNums(
            chaseIfN(xs, n, i),
            n,
            ++i
        )
;