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CodingLevel 3

Error handling

Easy

Medium

Hard

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StatusFormatCompany style

Easy

Slice access panics when emptyCode reviewCode review12 min Null role throws on equalsCode reviewCode review12 min Subscription lookup shared by the paywall and seat syncCode reviewCode review12 min

Medium

File handles accumulateCode reviewCode review20 min Context not cancelled on errorCode review · Google styleGoogle styleCode reviewGoogle style22 min Listener never unsubscribedCode reviewCode review25 min Resources not closedCode review · Oracle styleOracle styleCode reviewOracle style24 min Socket not closed on errorCode reviewCode review22 min Feature flag null handlingCode reviewCode review20 min Config lookup dereferences null pointerCode reviewCode review20 min Vector access before empty checkCode reviewCode review20 min Nightly payment capture batch jobCode review · Stripe styleStripe styleCode reviewStripe style20 min Retry wrapper for payments API callsCode review · Amazon styleAmazon styleCode reviewAmazon style20 min Inventory lookup in the checkout serviceCode review · Shopify styleShopify styleCode reviewShopify style15 min Transfer leaves account negativeCode review · Stripe styleStripe styleCode reviewStripe style25 min

Hard

Slice holds underlying arrayCode review · Google styleGoogle styleCode reviewGoogle style28 min Hash bucket negative moduloCode reviewCode review25 min Vector backward iteration underflowCode reviewCode review25 min SMS retry ignores transient failuresCode review · Stripe styleStripe styleCode reviewStripe style30 min Retry amplification across layersCode review · Google styleGoogle styleCode reviewGoogle style30 min Charge recorded before confirmationCode review · Stripe styleStripe styleCode reviewStripe style25 min Validation errors use abort codesCode review · Stripe styleStripe styleCode reviewStripe style24 min Resource freed twice on errorCode review · Microsoft styleMicrosoft styleCode reviewMicrosoft style30 min WebSocket handler not cleanedCode review · Meta styleMeta styleCode reviewMeta style24 min Thundering herd retry without backoffCode review · Amazon styleAmazon styleCode reviewAmazon style22 min Retry swallows 5xx errorsCode review · Stripe styleStripe styleCode reviewStripe style22 min Downstream call ignores request deadlineCode review · Google styleGoogle styleCode reviewGoogle style22 min