{"ScriptPreparationCode":"function lastIndexOf(str, sbj) {\r\n for (let i = str.length; i !== 0; i--) {\r\n if (str[i] === sbj) {\r\n return i\r\n }\r\n }\r\n}","TestCases":[{"Name":"native","Code":"var str = \u0022Hello world, welcome to the universe.\u0022;\r\nvar n = str.lastIndexOf(\u0022o\u0022);","IsDeferred":false},{"Name":"for loop","Code":"var str = \u0022Hello world, welcome to the universe.\u0022;\r\nvar n = lastIndexOf(str, \u0027o\u0027);","IsDeferred":false}]}