Awesome
ULID
An OTP library for generating Universally Unique Lexicographically Sortable Identifiers.
Build
$ make
Run tests
$ make test
Usage
Add to rebar
:
{deps, [
{ulid, {git, "https://github.com/savonarola/ulid.git", {tag, "0.1.1"}}}
]}.
Generate universally unique identifiers: The first 10 characters are encoded timestamps with millisecond precision, so these identifiers (generally) ascend from millisecond to millisecond (but unordered within the same millisecond). Using a generator, one can generate monotonically increasing identifiers (i.e. identifiers generated by the same generator are always ascending, assuming time is monotonic):
1> Gen0 = ulid:new(),
{Gen1, Ulid1} = ulid:generate(Gen0),
{Gen2, Ulid2} = ulid:generate(Gen1),
{Gen3, Ulid3} = ulid:generate_list(Gen2),
[Ulid1, Ulid2, Ulid3].
[<<"01ASXQ4J7ZT1XEZJFJFHE7G5R0">>,
<<"01ASXQ4J7ZT1XEZJFJFHE7G5R1">>,
"01ASXQ4J7ZT1XEZJFJFHE7G5R2"]