stable-position
Generate unique position that can be used to order items without renumbering them.
Description
The stable-position module generates unique, comparable position values by employing an algorithm analogous to decimal fraction notation. Each position is represented as a string of characters where each character corresponds to a level of granularity in a fraction. This representation allows direct comparison and ordering without the need to renumber items.
Because this approach relies on increasing the precision of the fractional part, it guarantees that a new position can always be found between any two existing valid positions, no matter how close they are.
Install
$ npm install --save stable-positionUsage
import { first, after, between } from 'stable-position';
import * as assert from 'assert';
const a = first();
const z = after(a);
const x = between(a, z);
assert(a < x && x < z);API
first()
returns a position value that can be used as a position of first element
before(p)
returns a position value that is smaller than the position represented by p
after(p)
returns a position value that is bigger than the position represented by p
between(p ,q)
return position value that is between p and q