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 Package.swift file:
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 indexSpotFlake use epoch as genrating base, also you can change the base epoch:
SpotFlake.epoch = 1514764800000To 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.
If you want to convert an ID to JSON, it should convert and pass as string, since JavaScript would loss precision for big integer.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent