{"ScriptPreparationCode":null,"TestCases":[{"Name":"unsift array","Code":"let arr = Array.from(Array(1000).keys())\r\n\r\nfor(i=0; i\u003C1000; i\u002B\u002B){\r\n\tarr.unshift(i);\r\n}\r\n\r\nconsole.log(arr);","IsDeferred":false},{"Name":"spread array","Code":"let arr = Array.from(Array(1000).keys())\r\n\r\nfor(i=0; i\u003C1000; i\u002B\u002B){\r\n\tarr = [i, ...arr];\r\n}\r\n\r\nconsole.log(arr);","IsDeferred":false}]}