Swift version snowflake (unique ID generator).
As an application developer, you create an instance of 'SpotFlake.Node' and then generate unique ID.
The latest version of Health works with the
4.2 version of the Swift binaries. You can download this version of the Swift binaries by following this link.
To leverage the SpotFlake package in your Swift application, you should specify a dependency for it in your
import PackageDescription let package = Package(name: "MyAwesomeSwiftProject", ... dependencies: [ .package(url: "https://github.com/shawnclovie/SpotFlake.git", .from: "0.1.0"), ],
And this is how you create a
SpotFlake.Node instance and generate ID:
import SpotFlake ... // the index would to mark ID generated source, e.g. server ID or process ID let nodeIndex: Int64 = 1 // the index should between 0...(-1 ^ (-1 << SpotFlake.nodeBits)) let node = SpotFlake.Node(node: nodeIndex)! ... // Generate new ID let id = node.generate() // Get date from the ID if needed node.time(of: id) // ID generating time node.node(of: id) // ID generator's node index
SpotFlake use epoch as genrating base, also you can change the base epoch:
SpotFlake.epoch = 1514764800000
To calculate the epoch:
import Foundation let formatter = DateFormatter() formatter.dateFormat = "yyyy-MM-dd ZZZ" print("epoch of custom date:", SpotFlake.Time(formatter.date(from: "2018-01-01 UTC")!).flakeTime)
The type of ID is Int64.