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Coding

Stack trace to root cause in three sentences

Read this stack trace from service name (language / framework). In three sentences: what failed, the most likely root cause, and the first thing I should check. Then list up to three other possible causes, ranked, each with the log line or metric that would confirm it. If the trace is cut off or ambiguous, say what extra information you need instead of guessing. paste stack trace

AArjun Mehta2,240 uses2,240 uses

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Coding

Unit tests for a function I paste

Write test framework tests for the function below. Cover the happy path, the boundaries, invalid input, and one property that should always hold. Use test names that read as sentences. Don't mock what you don't own. If the function is hard to test, suggest the smallest refactor that would help. paste function

AArjun Mehta720 uses720 uses

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Coding

Blameless postmortem from an incident timeline

Turn this incident timeline into a blameless postmortem. 1. Summary: what users saw, for how long, how many were affected 2. Timeline: in time zone, one line per event 3. Root cause: technical, never "human error" 4. What went well, what didn't 5. Action items: owner, due date, and whether each one prevents or detects If the timeline has gaps longer than 15 minutes, point them out. Timeline: paste timeline

DDaniel Okafor690 uses690 uses

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CodingStaff pick

Code review like a careful senior

AArjun Mehta1,730 uses1,730 uses

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Coding

Explain this module to a new teammate

Explain this language module to a new teammate who knows the language but not our codebase. Start with what it's for in one sentence, then the main flow, then the two things most likely to trip them up. Point to functions by name. Finish with a Mermaid sequence diagram of the call flow. paste code

DDaniel Okafor510 uses510 uses

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Coding

A regex, with tests that prove it

Write a regex in language that matches what it should match and does not match what it should not. Then give 8 test strings: 4 that should match and 4 that shouldn't, including edge cases like empty strings and Unicode. Explain each part of the pattern in a table. If a regex is the wrong tool here, say so and show the alternative.

AArjun Mehta990 uses990 uses

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