UUUID class abstract

Makes UUIDs (RFC 9562) with no package; v4 random and v7 time-sorted are the usual picks. UUUID.uuidV4()

Constructors

UUUID()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

isValid(String value) → bool

True when value looks like a UUID ("8-4-4-4-12" hex). UUUID.isValid(id)

timeOf(String value) → DateTime?

Creation time stored in a v7 UUID. UUUID.timeOf(id)

uuidV1() → String

Time + random node id (v1); sortable only within one device. UUUID.uuidV1()

uuidV4() → String

Fully random (v4), the classic choice for ids. UUUID.uuidV4() → "3f0c…-4…"

uuidV5(String namespace, String name) → String

Same name + namespace always gives the same id (v5, SHA-1). UUUID.uuidV5(UUUID.namespaceUrl, "https://x.com")

uuidV6() → String

Like v1 but the time comes first so ids sort by creation (v6). UUUID.uuidV6()

uuidV7() → String

Millisecond time + random, sorts by creation; best for database keys (v7). UUUID.uuidV7()

uuidV8([List<int>? bytes]) → String

Custom layout (v8): your 16 bytes with only version/variant bits set; random when omitted. UUUID.uuidV8()

versionOf(String value) → int?

Version number of a UUID (1-8), or null if it is not one. UUUID.versionOf(UUUID.uuidV7()) → 7

Constants

namespaceDns → const String

Namespace for uuidV5 names that are domain names.

namespaceUrl → const String

Namespace for uuidV5 names that are URLs.