{"ScriptPreparationCode":"window.arr = Array(10000).fill(0).map(x =\u003E {\r\n\tconst rnd = Math.random();\r\n\tx = rnd * 1e5 | 0;\r\n\treturn rnd \u003E 0.5 ? x : [x];\r\n});","TestCases":[{"Name":"flat","Code":"arr.slice().flat();","IsDeferred":false},{"Name":"concat","Code":"Array.prototype.concat.apply([], arr.slice());","IsDeferred":false}]}