{"ScriptPreparationCode":"var arr = new Array(15000);\r\narr.fill({ id: 0 });\r\narr = arr.map((el, idx) =\u003E el.id = idx);\r\nvar foo = Math.floor(Math.random() * 15000);","TestCases":[{"Name":"findIndex","Code":"var index = arr.indexOf(foo);","IsDeferred":false},{"Name":"map and indexOf","Code":"var index = arr.map(o =\u003E o.id).indexOf(foo);","IsDeferred":false},{"Name":"find","Code":"var found = arr.find(e =\u003E e.id === foo)","IsDeferred":false}]}