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alphanumeric-sort

v0.0.1

Published

alphanumeric-sort

Downloads

1,660

Readme

Alphanumeric sort for JavaScript

A usable, portable, algorithm/comparator for sorting things like filenames and addresses that contain numbers.

For example

The algorithm will sort the following files in this order:

file 1.txt
file 5.txt
file 39.txt
file 100.txt

as opposed to this order (which is what the default JavaScript comparator produces)

file 1.txt
file 100.txt
file 39.txt
file 5.txt

Usage

The library provides a comparator that can be fed to Array.prototype.sort.

First you do

> npm install alphanumeric-sort

And then you do

var compare = require('alphanumeric-sort').compare;

["file 100.txt", "file 5.txt", "file 39.txt"].sort(compare);
//=> ["file 5.txt", "file 39.txt", "file 100.txt"]

Caveats

The implementation is quick & dirty - it just prepends "enough" zeroes before every digit sequence in the string before comparing lexicographically.

The maximum amount of consecutive digits is 20, after that all bets are off.

(Thanks for the idea, http://www.bennadel.com/blog/2495-User-Friendly-Sort-Of-Alpha-Numeric-Data-In-JavaScript.htm)

It's not probably very fast. (To be honest, I haven't really tested.)