ULIDs (Universally unique Lexicographically sortable IDentifiers) are 128-bit identifiers similar to UUIDs but with key advantages: they use Crockford's base32 encoding for a compact 26-character string representation without special characters, embed UNIX timestamps in the first 48 bits for monotonic sorting, and provide better readability. The post demonstrates a C++ implementation showing how to generate ULIDs by combining timestamp data with random bits, encode them using base32, and includes practical code examples with bit manipulation techniques for extraction and encoding.
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