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LispCast

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Visit lispcast.com → On Hacker News Jan 2009 – Apr 2019

Software Engineering 6Programming Languages 3Tools & Productivity 2Web & Frontend 1

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What Is Idempotence?

Idempotence means duplicates don't matter. It means you can safely retry an operation with no issues. The classic example is the elevator button: you press it twice and it does not call two elevators. We explore why we would want that property in an email server.