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Programming › Algorithm Cookbook › Chapter 5. Hashing and Maps ›

5.19 Deterministic Hashing

5.19 Deterministic Hashing Problem You need hash values that remain stable across program runs, machines, builds, or language runtimes. Many hash tables deliberately use randomized hashing for attack resistance. This is good for public-facing in-memory maps, but it is wrong when the hash value becomes part of a persistent file, cache key, distributed partition rule, or reproducible build artifact. Solution Use a fixed, documented hash function with fixed parameters. deterministic_hash(key)...

Maths › 00. General Mathematics ›

09.5 Reproducibility and Verification

9.5 Reproducibility and Verification Computation is useful only when we can trust the result. If a calculation gives an answer, we should be able to ask two basic questions: can someone repeat the same computation, and can someone check that the result is correct? Reproducibility means that the same method gives the same result when repeated. Verification means checking that the method and the result are correct. Reproducibility Suppose a...