Not that it matters, but for the sake of offering an alternative solution I'd probably lean more towards Object.fromEntries than reduce.
Object.fromEntries
reduce
Object.fromEntries(users.map(u => [ u.id, u ]))
totally matters and I wish I could heart this twice -- I've never seen Object.fromEntries!
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Not that it matters, but for the sake of offering an alternative solution I'd probably lean more towards
Object.fromEntriesthanreduce.totally matters and I wish I could heart this twice -- I've never seen
Object.fromEntries!