{"ScriptPreparationCode":"data = [{\u0022a\u0022: 1, \u0022b\u0022: 2}, {\u0022c\u0022: 1, \u0022d\u0022: 2}, {\u0022e\u0022: 1, \u0022f\u0022: 2}];\r\n\r\nfunction newArr(arr) {\r\n\tconst len = arr.length - 1;\r\n \tconst ret = [];\r\n \tfor (let i = 0; i \u003C len; i\u002B\u002B) ret.push(i);\r\n \treturn ret;\r\n}","TestCases":[{"Name":"A","Code":"let val = data.slice(0, -1).map((value, index) =\u003E index);","IsDeferred":false},{"Name":"B","Code":"let val = newArr(data);","IsDeferred":false}]}