{"ScriptPreparationCode":"var size = 20;\r\nvar arr = [...Array(size)].map((_, idx) =\u003E idx);\r\nvar pointer = 0;","TestCases":[{"Name":"push -\u003E shift","Code":"arr.push(123)\r\narr.shift()","IsDeferred":false},{"Name":"rotating pointer","Code":"arr[pointer\u002B\u002B] = 123;\r\nif (pointer \u003E= size) pointer = 0;","IsDeferred":false}]}