{"ScriptPreparationCode":"var arr = new Array(1000).fill(null);\r\nfor(let i = 0; i \u003C arr.length; i\u002B\u002B) {\r\n\tif(i % 3 === 0) {\r\n \tarr[i] = [1];\r\n } else if(i % 2 === 0) {\r\n \tarr[i] = {a: 1};\r\n } else {\r\n arr[i] = \u00271\u0027;\r\n }\r\n}\r\n\r\n","TestCases":[{"Name":"instanceof Array","Code":"let circle = 50;\r\nwhile(circle \u003E 0) {\r\n\tconst check = arr.map(item =\u003E item instanceof Array);\r\n \tcircle--;\r\n}","IsDeferred":false},{"Name":" Array.isArray()","Code":"let circle = 50;\r\nwhile(circle \u003E 0) {\r\n\tconst check = arr.map(item =\u003E Array.isArray(item));\r\n \tcircle--;\r\n}","IsDeferred":false}]}