{"ScriptPreparationCode":"var refArr = [\u0022a\u0022, \u0022b\u0022, \u0022c\u0022];\r\n\r\n\r\nvar obj = {\r\n a : 2,\r\n b: \u00223\u0022,\r\n c: \u0022yasss\u0022,\r\n //d: \u0022queen\u0022,\r\n}\r\n\r\nvar keys = Object.keys(obj);","TestCases":[{"Name":"includes","Code":"\r\nconst rB = refArr.every(elem =\u003E keys.includes(elem)) \u0026\u0026 keys.length === 3;","IsDeferred":false},{"Name":"set","Code":"const s = new Set(keys);\r\nconst rC = refArr.every(elem =\u003E s.has(elem)) \u0026\u0026 keys.length === 3;","IsDeferred":false},{"Name":"in","Code":"const rA = refArr.every(elem =\u003E elem in obj) \u0026\u0026 keys.length === 3;","IsDeferred":false}]}