126 lines
3.3 KiB
Markdown
126 lines
3.3 KiB
Markdown
|
|
|||
|
|
[Build]: http://img.shields.io/travis/litejs/natural-compare-lite.png
|
|||
|
|
[Coverage]: http://img.shields.io/coveralls/litejs/natural-compare-lite.png
|
|||
|
|
[1]: https://travis-ci.org/litejs/natural-compare-lite
|
|||
|
|
[2]: https://coveralls.io/r/litejs/natural-compare-lite
|
|||
|
|
[npm package]: https://npmjs.org/package/natural-compare-lite
|
|||
|
|
[GitHub repo]: https://github.com/litejs/natural-compare-lite
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
@version 1.4.0
|
|||
|
|
@date 2015-10-26
|
|||
|
|
@stability 3 - Stable
|
|||
|
|
|
|||
|
|
|
|||
|
|
Natural Compare – [![Build][]][1] [![Coverage][]][2]
|
|||
|
|
===============
|
|||
|
|
|
|||
|
|
Compare strings containing a mix of letters and numbers
|
|||
|
|
in the way a human being would in sort order.
|
|||
|
|
This is described as a "natural ordering".
|
|||
|
|
|
|||
|
|
```text
|
|||
|
|
Standard sorting: Natural order sorting:
|
|||
|
|
img1.png img1.png
|
|||
|
|
img10.png img2.png
|
|||
|
|
img12.png img10.png
|
|||
|
|
img2.png img12.png
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
String.naturalCompare returns a number indicating
|
|||
|
|
whether a reference string comes before or after or is the same
|
|||
|
|
as the given string in sort order.
|
|||
|
|
Use it with builtin sort() function.
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
### Installation
|
|||
|
|
|
|||
|
|
- In browser
|
|||
|
|
|
|||
|
|
```html
|
|||
|
|
<script src=min.natural-compare.js></script>
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
- In node.js: `npm install natural-compare-lite`
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
require("natural-compare-lite")
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### Usage
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
// Simple case sensitive example
|
|||
|
|
var a = ["z1.doc", "z10.doc", "z17.doc", "z2.doc", "z23.doc", "z3.doc"];
|
|||
|
|
a.sort(String.naturalCompare);
|
|||
|
|
// ["z1.doc", "z2.doc", "z3.doc", "z10.doc", "z17.doc", "z23.doc"]
|
|||
|
|
|
|||
|
|
// Use wrapper function for case insensitivity
|
|||
|
|
a.sort(function(a, b){
|
|||
|
|
return String.naturalCompare(a.toLowerCase(), b.toLowerCase());
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
// In most cases we want to sort an array of objects
|
|||
|
|
var a = [ {"street":"350 5th Ave", "room":"A-1021"}
|
|||
|
|
, {"street":"350 5th Ave", "room":"A-21046-b"} ];
|
|||
|
|
|
|||
|
|
// sort by street, then by room
|
|||
|
|
a.sort(function(a, b){
|
|||
|
|
return String.naturalCompare(a.street, b.street) || String.naturalCompare(a.room, b.room);
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
// When text transformation is needed (eg toLowerCase()),
|
|||
|
|
// it is best for performance to keep
|
|||
|
|
// transformed key in that object.
|
|||
|
|
// There are no need to do text transformation
|
|||
|
|
// on each comparision when sorting.
|
|||
|
|
var a = [ {"make":"Audi", "model":"A6"}
|
|||
|
|
, {"make":"Kia", "model":"Rio"} ];
|
|||
|
|
|
|||
|
|
// sort by make, then by model
|
|||
|
|
a.map(function(car){
|
|||
|
|
car.sort_key = (car.make + " " + car.model).toLowerCase();
|
|||
|
|
})
|
|||
|
|
a.sort(function(a, b){
|
|||
|
|
return String.naturalCompare(a.sort_key, b.sort_key);
|
|||
|
|
})
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
- Works well with dates in ISO format eg "Rev 2012-07-26.doc".
|
|||
|
|
|
|||
|
|
|
|||
|
|
### Custom alphabet
|
|||
|
|
|
|||
|
|
It is possible to configure a custom alphabet
|
|||
|
|
to achieve a desired order.
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
// Estonian alphabet
|
|||
|
|
String.alphabet = "ABDEFGHIJKLMNOPRSŠZŽTUVÕÄÖÜXYabdefghijklmnoprsšzžtuvõäöüxy"
|
|||
|
|
["t", "z", "x", "õ"].sort(String.naturalCompare)
|
|||
|
|
// ["z", "t", "õ", "x"]
|
|||
|
|
|
|||
|
|
// Russian alphabet
|
|||
|
|
String.alphabet = "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюя"
|
|||
|
|
["Ё", "А", "Б"].sort(String.naturalCompare)
|
|||
|
|
// ["А", "Б", "Ё"]
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
|
|||
|
|
External links
|
|||
|
|
--------------
|
|||
|
|
|
|||
|
|
- [GitHub repo][https://github.com/litejs/natural-compare-lite]
|
|||
|
|
- [jsperf test](http://jsperf.com/natural-sort-2/12)
|
|||
|
|
|
|||
|
|
|
|||
|
|
Licence
|
|||
|
|
-------
|
|||
|
|
|
|||
|
|
Copyright (c) 2012-2015 Lauri Rooden <lauri@rooden.ee>
|
|||
|
|
[The MIT License](http://lauri.rooden.ee/mit-license.txt)
|
|||
|
|
|
|||
|
|
|