Ask HN: Preventing Starbucks card type hacks 3 points by tmaly 11y ago ↗ HN What strategies have you employed when creating a system to prevent race conditions like happened to Starbucks where people are able add money to their cards?
[–] pizza 11y ago ↗ Seems like a job for a mutex! Though I'll admit I haven't actually employed strategies against race conditions in any kind of web context...
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