Koid generator yields k-ordered, conflict-free ids in a distributed environment, based on flake-idgen
npm i koid
The Koid is made up of: timestamp
, dataCenter
, worker
and counter
. Examples in the following table:
| Timestamp | Datacenter | Worker | Counter | Koid |
|---|---|---|---|---|
| 0x8c20543b0 | 0b00000 | 0b00000 | 0x000 | 0x02308150ec000000 |
| 0x8c20543b1 | 0b00000 | 0b00000 | 0x000 | 0x02308150ec400000 |
| 0x8c20543b1 | 0b00000 | 0b00000 | 0x001 | 0x02308150ec400001 |
| 0x8c20543b1 | 0b00000 | 0b00000 | 0x002 | 0x02308150ec400002 |
| 0x8c20543b1 | 0b00000 | 0b00000 | 0x003 | 0x02308150ec400003 |
| 0x8c20c0335 | 0b00011 | 0b00001 | 0x000 | 0x02308300cd461000 |
| 0x8c20c0335 | 0b00011 | 0b00001 | 0x001 | 0x02308300cd461001 |
As you can see, each Koid is 64 bits long, consisting of:
timestamp
, a 42 bit long number of milliseconds elapsed since 1 January 1970 00:00:00 UTC dataCenter
, a 5 bit long datacenter identifier. It can take up to 32 unique values (including 0)worker
, a 5 bit long worker identifier. It can take up to 32 unique values (including 0)counter
, a 12 bit long counter of ids in the same millisecond. It can take up to 4096 unique values. Breakdown of bits for an id e.g.<PHONE_NUMBER>445124608
(counter is 0
, dataCenter is 7
and worker 3
) is as follows:
010100001110000110101011101110100001000111 00111 00011<PHONE_NUMBER>00
| ------------ | 12 bit counter |
| ------------ |5 bit worker
|-----| 5 bit datacenter
| ----- ----- | 10 bit generator identifier |
| ----------- |42 bit timestamp
Koid Generator returns 8 byte long node Buffer objects with its bytes representing 64 bit long id. Note that the number is stored in Big Endian format i.e. the most significant byte of the number is stored in the smallest address given and the least significant byte is stored in the largest.
Koid generator instance has one getter next
returning generated id.
import { KoidFactory } from 'koid'
const koid = KoidFactory()
console.log(koid.next)
console.log(koid.next)
console.log(koid.next)
console.log(koid.nextBigint)
It would give something like:
<Buffer 50 dd d5 99 01 c0 00 00>
<Buffer 50 dd d5 99 02 80 00 00>
<Buffer 50 dd d5 99 02 80 00 01>
5827048346035945474n
Koid generator can generate up to 4096 unique identifiers within a millisecond. When generator tries to generate more than 4096 identifiers within a millisecond, an error is thrown.
Koid generator constructor takes optional parameter (generator configuration options) with the following properties:
dataCenter
(5 bit) - datacenter identifier. It can have values from 0 to 31.worker
(5 bit) - worker identifier. It can have values from 0 to 31.id
(10 bit) - generator identifier. It can have values from 0 to 1023. It can be provided instead of dataCenter
and worker
identifiers.epoch
- number used to reduce value of a generated timestamp. Note that this number should not exceed number of milliseconds elapsed since 1 January 1970 00:00:00 UTC. It can be used to generate smaller ids.Example of using dataCenter
and worker
identifiers:
import { KoidFactory } from 'koid'
const koid = KoidFactory()
const koid2 = KoidFactory({ dataCenter: 9, worker: 7 })
console.info(koid.next);
console.info(koid2.next);
It would give something like:
<Buffer 50 dd da 8f 43 40 00 00>
<Buffer 50 dd da 8f 43 d2 70 00>
Koid generator has config getter that can be read from a generator instance:
dataCenter
- returns worker number used for generator creationworker
- returns worker number used for generator creationimport { KoidFactory } from 'koid'
const koid = KoidFactory({ id: 34 })
console.info(koid.dataCenter); // 1
console.info(koid.worker); // 2
From time to time Node.js clock may move backward. In most cases it is only a few millisecond. However, as the generator relies on current timestamp, it won't be able to generate conflict-free identifiers (i.e. without duplicates) until the clock catches up with the last timestamp value. In case of clock move backward an error is thrown.
Koid generator returns Node.js Buffer representing 64-bit number for the sake of future extensions or returned buffer modifications. Node Buffer can also be very easily converted to string format
import { KoidFactory } from 'koid'
const koid = KoidFactory()
const buf: Buffer = koid.next
const id = buf.readBigInt64BE() // also koid.nextBigint
const hexId = buf.toString('hex')
It would give something like:
<Buffer 5d c2 cd d1 f4 fd 30 00>
6756188692651257856n // bigint
5dc2cdd1f4fd3000 // hex string
npm run repo:init
npm run bootstrap
npm run lint
to check code style.npm run test
to run unit test.npm run clean
before npm run build
, if any file under typescript outDir folder was deleted manually.NPM
, configurated in file lerna.json
| Package | Version | Dependencies | DevDependencies |
|---|---|---|---|
koid |
|||
egg-koid |
Generated using TypeDoc


Aid package for two firms cleared
by Special CorrespondentThe State Cabinet has cleared proposals for a package of assistance for two companies, as part of the government’s efforts to promote industrial investment in the State.
At its meeting on Tuesday, the Cabinet gave its nod to a proposal, concerning the Cheyyar SEZ Developers, for an additional investment of ₹175 crore. Cheyyar of Tiruvannamalai district is home to a footwear unit. Another proposal pertained to an investment of ₹350 crore by Sundaram Clayton for its unit in Hosur, Krishnagiri district, during 2015-18. Sources in the Industries Department clarified that the package, which should have been provided before the investment was made, was not granted to the firm due to a “communication gap”, which had since been set right.


coqtop.byte - The bytecode Coq toplevel
coqtop.byte [ options ] [ file ]
coqopt.byte is the bytecode version of Coq. It should not be called directly, but only by coqtop and coqc
coqtop (1), coqc (1).
The Coq Reference Manual. The Coq web site: http://coq.inria.fr


[All]Citizens
All
Aid Stations
Temporary Housing
Food
Medical
Evacuation
Emergency Services
All
Emergency
Response in Progress
Police Centers
Fire Stations
Military
All
Forward Operating Bases
Supply Depot
Local Headquarters
Headquarters
Volunteers
All
Volunteer Depot
Donation Depot
Volunteer FOB
Volunteer Headquarters
Innovative Data Streams
All
REA Good
REA Bad
Twitter
Facebook
MirageXML


Hi, I'm Justin! 👋
I’m a mechanical design engineer with 5 years of experience, looking to break into software development. After using COVID-19 stay-at-home as an opportunity to teach myself, I’m looking for my first job! I used this time to learn the MERN stack, but I'm interested in learning about Python, Java, C/C++, or any other language or technology. I'm looking for a role where I can continue my fast growth, either taking advantage of the skills I've already built or allowing me to build new ones. I'm from Connecticut, but I'd like to use this career change as an opportunity to move to a major urban area (preferably in the US), so I'm very open to relocating for a chance to continue my growth.
BANK OF WASSERSTEIN is a demonstration banking application that allows users to create checking, savings, and investing accounts, submit deposits and withdrawals, and transfer money to other users. It’s a single page, fullstack application that uses React and Redux on the frontend and Node.js, Express, and MongoDB on the backend. The frontend is served by GitHub Pages and the backend runs on Heroku with a managed database provided by MongoDB Atlas. It was designed using Figma.
How to Use: Sign up for a user account, then create a checking, savings, or investing account.
What I Learned: As this was my first project that wasn’t guided by a course, it solidified my knowledge in every step of the fullstack application making process, including the design and basic HTML/CSS, working with React and Redux, creating routes and handling authentication, working with the database, and deployment.
JW Footwear is a demonstration e-commerce application that sells shoes. It allows users to add shoes of various sizes to their cart, place orders, view their order history, and leave reviews and ratings on products they’ve purchased. I built it using the same MERN stack as BANK OF WASSERSTEIN, and it uses the same cloud services - GitHub Pages, Heroku and MongoDB Atlas.
How to Use: View the various shoes for sale, pick a size and add to your cart. Make an account and you’ll be able to checkout with shipping and fake payment information. View your order history in your profile by clicking on your account name.
What I Learned: As this was my second application, I had an opportunity to reuse components, adapting them where necessary to my new project. I found it more challenging to make this application responsive due to the more complex interface. This application was also generally more complex, with more pages, database collections, and components.
EngineRoom is a social media application for car enthusiasts. It allows users to make posts, make comments, upload pictures of their cars, set a profile picture, and find friends who share car interests. It's also a MERN application, with the frontend served by GitHub Pages, the backend running on Heroku, and user images hosted on Amazon S3.
How to Use: First, make an account. You'll automatically be friends with a few demo accounts. You can see a list of people you're not already friends with on the left, and a list of EngineRoom user's cars on the right. You can make posts, add comments, or like other's posts on your feed. You can also update your profile by clicking on your name in the navbar.
What I Learned: This application was the most complicated of all, with the most data to keep track of and generally the most complex logic. It's also the first application I made which allows users to upload their own images, so I learned how to deal with the AWS SDK including authentication and file uploads.
Responsible for HPC Split Cases used in the PW1000G Geared Turbofan (commercial) and PW800 (business jet) engines
Held 2 positions in Transmission and Driveline Engineering as part of a new-hire rotation program
Design & Release Engineer – Differentials (6 months)
Transmission Calibration Engineer – Validation (6 months)
GPA: 3.4
Team Lead - Driver Controls
Competed in a student design competition to design, build, and race a small single-seat race car, placing 19th out of 120 teams
Copyright © 2021, Justin Wasserstein


Review: Anna and the King (1999)
Review by Scott Hunt. Visit me at Movie Hunt http://netdirect.net/~hunt/index.html
Cast: Chow Yun-Fat, Jodie Foster, Bai Ling Director: Andy Tennant Writer: Anna Leonowens, Steve Meerson, Peter Krikes
Rating: Good Shot (3 out of 4 stars)
Anna and the King strides onto the screen in full regalia, wearing a brilliant suit of sumptuous landscapes, deep, vibrant colors and an epic storyline. It's true beauty comes from it's subtle ruminations on the politics of power, whether it's between governments, or the interplay between a man and a woman.
Anna (Jodie Foster) is a widowed British schoolteacher with a touch of wanderlust trying to grasp her quicksilver feelings concerning the recent death of her husband. With son in tow, she takes the employ of King Mongkut (Chow Yun-Fat) to tutor his son in the English language. Mongkut sees the strength of the British and correctly surmises that his country's future lies in opening itself up to the ways of the western world. Anna function is to help provide that link.
The core of the film, of course, deals with the blossoming love between Anna and Mongkut as it attempts to germinate in the unfriendly soil of a shifting political climate. Foster plays Anna with equal parts clenched jaw and wide-eyed wonder. She is assertive, yet, respectful of the king as she initially tries to impose her western sensibilities upon him. It is one of Foster's strongest performances since Silence of the Lambs in a role she could not have played earlier in her career. She brings a mature self- awareness and determination that might not have come across from a younger Foster. It's a joy to watch her cagily bargain for her own measure of influence within the realm of Mongkut's monarchy. When she makes her entrance into a politically charged banquet mid-film, she exudes a hypnotic beauty that is deepened by her textured performance.
Chow-Yun Fat's King Mongkut is every measure of Foster's Anna, perhaps even more so. This is the Chow Yun-Fat that Hong Kong cinema has been in love with for nearly twenty years. He is imposing, yet vulnerable, playful, but stern. It is an impressively assured and nuanced performance.
Precious time is stolen from the movie's 155 minutes running time by an unengaging subplot involving one the King's concubines (Bai Ling) and her love of a commoner. It strikes with the subtlety of Siam's fabled white elephant as it stomps through the leisurely paced story.
Some may be put off by the action filled climax of the movie. Although a bit inconsistent in tone from the rest of the film, it fits within the established subplot of a perceived siege by neighboring Burma, a country backed by the British.
Anna and the King transcends being a predictable, traditional love story by avoiding mawkishness. It shows a seduction of intelligence. Ever mindful of each other's positions, Anna and King Mongkut negotiate a maze of social customs, conflicting world views and lost loved ones to connect on a level that ultimately proves deeply satisfying, if not achingly bittersweet.
Sent via Deja.com http://www.deja.com/ Before you buy.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
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Related links: index of all rec.arts.movies.reviews reviews


All-Time Lists
This section provides lists of the top performances for all years for standard events from 3000m through 100 km. Standards are the same as for record qualification.
Road
Performances are for courses that are believed to be accurate. Point-to-point courses are defined as those courses whose start and finish lie more than 30% of the race distance apart and/or whose drop exceeds 1 meter per kilometer. If the drop is less than 5 meters per kilometer, performances are considered statistically valid. Such performances are included and have an "a" appended to the time, indicating these are potentially aided performances.
Performances on point-to-point courses whose drop exceeds 5 meters per kilometer are not considered statistically valid and are not included.
|
50 km |
n/a |
||||
|
100 km |
n/a |
||||
|
100 mile |
|||||
|
24 hour |
n/a |
||||
|
48 hour |
n/a |
n/a |
n/a |
n/a |
15,000m
n/a
n/a
n/a
10 mile
n/a
n/a
n/a
20,000m
n/a
n/a
n/a
25,000m
n/a
n/a
n/a
30,000m
n/a
n/a
n/a
n/a
n/a
n/a
one hour
two hour
n/a
n/a
n/a
24 hour
n/a
n/a
n/a
48 hour
n/a
n/a
n/a
Outdoor Track
100 mile
world
"x" indicates a mark made in a mixed race
Indoor Track
marathon
n/a
n/a
n/a
n/a
n/a
n/a
48 hour
n/a
n/a
n/a
"a" indicates marks made on over-sized tracks (> 220
yd)
50,000m


| I l@ve RuBoard |
The Python library is huge (231 files in the latest Windows distribution), but a full library reference in HTML format is included with every Python installation. You may also download printable versions in PostScript or PDF formats from www.python.org and circulate copies without restriction: the document is a similar size to this book.
As a convenience to the armchair reader we have included the key functions and modules that are likely to be used by most nontrivial programs. These are nearly direct reproductions from the Python Library. The Python Library is also Open Source, but we are required to include this copyright notice:
The Python Library Reference is Copyright © 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. All Rights Reserved.
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI or Corporation for National Research Initiatives or CNRI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission.
This appendix covers:
Methods of built-in types such as lists, dictionaries, and files
Built-in functions
The sys module
The os and os.path modules
The string module
| I l@ve RuBoard |