hash provides a way to hash binary data, i.e. produce a shorter value,
that is highly content dependent, so even slightly different content will
produce widely different hashes.
Hash functions are useful for implementing maps, caches etc.
hash.adler32 - Adler-32 (RFC 1950 checksum used by zlib)hash.crc32 - CRC-32 variants (IEEE 802.3 crc32, Castagnoli crc32c, Koopman crc32k,
CRC-32Q crc32q)hash.crc64 - CRC-64-ECMA-182hash.fnv1a - Fowler-Noll-Vo hashes