Exceptions and error handling
How to handle errors well: exceptions versus error values, try, catch and finally, checked and unchecked exceptions in Java, Python's exception style, when to catch and when to let errors propagate, custom exceptions, cleaning up resources, retrying, error handling at API boundaries, and anti-patterns to avoid.
CodexBash, , 6 min read
Every real program fails sometimes: files are missing, networks time out, users type nonsense, databases reject writes. The difference between robust software and fragile software is rarely whether errors happen; it is how they are handled: whether failures are noticed, reported clearly, cleaned up after, and kept from corrupting data or leaking details to users. This article covers the mechanics of exceptions in common languages and, more importantly, the judgement of where and how to handle them.
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