Исходное сообщение
"В репозитории NPM выявлено 25 вредоносных пакетов " Отправлено Аноним, 23-Фев-22 12:52
Как бы самому прогать на такой штука... сам панимаиш... [] + [] → "" // Empty string? These are arrays! [] + {} → [object object] {} + [] → 0 // Why isn't the operation commutative??? {} + {} → NaN // ??? 16 == [16] → true // Array converted into string, then into number 16 == [1,6] → false // But what is array converted into? "1,6" == [1,6] → true var arr = []; arr.length → 0 arr[3] → "undefined" // No array bounds exception??? arr[3] = "hi"; arr.length → 4 // 4??? Only one element has been added! arr["3"] → "hi" // Apparently "3" is coerced into a number delete(arr[3]); arr.length → 4 // 4??? There are no elements in the array! arr[3] → "undefined" // 7 lines above, length was "0"! var i = 1; i = i + ""; // Oops! i + 1 → "11" i - 1 → 0 var j = "1"; ++j → 2 // Okay, but... var k = "1"; k += 1 → "11" // What??? [1,5,20,10].sort() → [1, 10, 20, 5] // Why is it sorting strings??? xs = ["10", "10", "10"]; xs.map(parseInt) → [10, NaN, 2] // ??? y = {}; y[[]] = 1; Object.keys(y) → [""]