Code RoomTransfer hangs between accounts
HardPrep Room Coding #1638

Transfer hangs between accounts

Code reviewConcurrencySenior–Staff~30 min

Review this Go account-transfer function.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 30 min
Mark a line and say what kind of problem it is.0 findings
1type Account struct {
2 mu sync.Mutex
3 balance int64
4}
5 
6func Transfer(from, to *Account, amt int64) {
7 from.mu.Lock()
8 defer from.mu.Unlock()
9 to.mu.Lock()
10 defer to.mu.Unlock()
11 from.balance -= amt
12 to.balance += amt
13}
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