{"ScriptPreparationCode":"var values = [];\r\nfor (i = 0; i \u003C 1000; i \u002B= 1) {\r\n values[i] = Math.random() \u003C 0.5 ? {a: 5} : {b: 5};\r\n}\r\n","TestCases":[{"Name":"===","Code":"values.filter(a =\u003E a.a === undefined)","IsDeferred":false},{"Name":"typeof","Code":"values.filter(a =\u003E typeof a.a === \u0022undefined\u0022)","IsDeferred":false}]}