polish-sort

Description

Comparator functions for dealing with Polish accented characters when sorting in JavaScript. Features 100% test coverage.

Why

JavaScript fails to sort polish characters properly. Example:

[ 'la', 'łb', 'z' ].sort(); // ["la", "z", "łb"]

Now, there is String.prototype.localeCompare to deal with localized comparisons:

[ 'la', 'łb', 'z' ].sort((a, b) => a.localeCompare(b, 'pl')); // ["la", "łb", "z"]

Unfortunately, it does not work in older browsers, such as IE <= 10 or Safari <= 9.1.

Installation

npm install --save polish-sort

API

caseInsensitiveComparator(a, b)

Useful when you want to sort an Array of String. Just pass the reference as an argument to Array.prototype.sort.

import { caseInsensitiveComparator } from 'polish-sort';
 
[ 'łc', 'Ła', 'łb' ].sort(caseInsensitiveComparator); // ["Ła", "łb", "łc"]

caseSensitiveComparator(a, b)

Useful when you want to sort an Array of String. Just pass the reference as an argument to Array.prototype.sort.

import { caseSensitiveComparator } from 'polish-sort';
 
[ 'łc', 'Ła', 'łb' ].sort(caseSensitiveComparator); // ["łb", "łc", "Ła"]

createComparator(options)

Useful when you want to sort an Array of Object by some attribute. Returns a comparator. Accepts 1 optional argument of type Object with the following (both optional) attributes:

• getter - Function - defaults to: (a) => a
• ignoreCase - Boolean - defaults to: false

import { createComparator } from 'polish-sort';
 
const comparator = createComparator({
  getter: (value) => value.name,
  ignoreCase: true
});
 
[
  { name: 'la', age: 1 },
  { name: 'łb', age: 2 },
  { name: 'lc', age: 3 }
].sort(comparator);
// [
//   { name: "la", age: 1 },
//   { name: "lc", age: 3 },
//   { name: "łb", age: 2 }
// ]