arcweave/fractional-indexing

Fractional Indexing implementation in PHP

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Details

github.com/Arcweave/fractional-indexing-php

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v1.0.0 2023-03-01 11:53 UTC

Requires

  • php: >=7.3

Requires (Dev)

MIT 06056335e5a5276d68592e2215be5ff1fcd3ab01

  • Manolis Dermitzakis <mgdermitz.woop@gmail.com>

indexingindexesfractionalfractional indexing

This package is not auto-updated.

Last update: 2025-07-16 22:49:13 UTC

README

This is based on Implementing Fractional Indexing by David Greenspan .

Fractional indexing is a technique to create an ordering that can be used for Realtime Editing of Ordered Sequences.

This implementation includes variable-length integers, and the prepend/append optimization described in David's article.

This implementation was based on the JS Implementation from rocicorp.

Installation

$ composer install arcweave/fractional-indexing

Other Languages

This is a PHP port of the original JavaScript implementation by @rocicorp. That means that this implementation is byte-for-byte compatible with:

Language Repo
JavaScript https://github.com/rocicorp/fractional-indexing
Go https://github.com/rocicorp/fracdex
PHP https://github.com/rocicorp/fractional-indexing