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Обычно для группировки массива по какому-то ключу используют reduce

Однако уже доступны Object.groupBy и Map.groupBy, которые позволяют упростить эту процедуру

const users = [
{ id: 1, name: "Alex", role: "admin" },
{ id: 2, name: "Anna", role: "user" },
];

const grouped = Object.groupBy(users, ({ role }) => role);

// Результат:
// { admin: [{...}], user: [{...}] }


#js



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Обычно для группировки массива по какому-то ключу используют reduce

Однако уже доступны Object.groupBy и Map.groupBy, которые позволяют упростить эту процедуру

const users = [
{ id: 1, name: "Alex", role: "admin" },
{ id: 2, name: "Anna", role: "user" },
];

const grouped = Object.groupBy(users, ({ role }) => role);

// Результат:
// { admin: [{...}], user: [{...}] }


#js

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The Singapore stock market has alternated between positive and negative finishes through the last five trading days since the end of the two-day winning streak in which it had added more than a dozen points or 0.4 percent. The Straits Times Index now sits just above the 3,060-point plateau and it's likely to see a narrow trading range on Monday.

Importantly, that investor viewpoint is not new. It cycles in when conditions are right (and vice versa). It also brings the ineffective warnings of an overpriced market with it.Looking toward a good 2022 stock market, there is no apparent reason to expect these issues to change.

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