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const arraysAreEqual = (...arrays) =>
arrays.map(array => array.length).every((el, _, src) => el === src[0]) &&
arrays.every(
(array, _) => array.every(
(_, id) => array[id] === arrays[0][id] || Number.isNan(array[id]) && Number.isNan(arrays[0][id])
)
);
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isNaN
приводит типы, Number.isNaN
- нет.IS
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Object.is
, но там уже signed zero считается.IS
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