Quick and really dirty and not exactly efficient :D
function rrotate(arr, steps) { steps = (steps || 0) % arr.length; return new Proxy(arr, { get(target, prop) { const idx = typeof prop === "string" ? Number(prop) - steps : NaN; return Number.isInteger(idx) ? target[idx >= 0 ? idx : target.length + idx] : target[prop]; } }); }
But it works (mostly)
Array.from(rrotate([1,2,3,4,5], 2)) // [4, 5, 1, 2, 3] rrotate([1,2,3,4,5], 2).slice() // [4, 5, 1, 2, 3] rrotate([1,2,3,4,5], 2).forEach(e => console.log(e)) // 4 // 5 // 1 // 2 // 3 [...rrotate([1,2,3,4,5], 7)] // [4, 5, 1, 2, 3] for (let e of rrotate([1,2,3,4,5], 12)) console.log(e); // 4 // 5 // 1 // 2 // 3
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Quick and really dirty and not exactly efficient :D
But it works (mostly)