Sorting array keys case insensitive with swedish chars

Question

I'm trying to sort an array by keys with swedish chars in an alphabetical "Natural sort order". This is the test array:

var test = [];
test["abc"] = [];
test["ABC"] = [];
test["test"] = [];
test["Test"] = [];
test["åäö"] = [];
test["ÅÄÖ"] = [];

The desired result is the order the array is created (abc, ABC, test, Test, åäö, ÅÄÖ), but I can't figure out how to get that order.

I've tried using:

var sortedKeys = Object.keys(test).sort();

And:

var sortedKeys= Object.keys(test).sort(function (a, b) {
    return a.toLowerCase().localeCompare(b.toLowerCase());
});

But I can't get the desired order of the keys. Here's a jsfiddle with some tests: https://jsfiddle.net/3cs491gq/

Thanks for any help sorting (!) this out.

Answer 1

Don't use toLowerCase , and just use sort with localeCompare :

 var test = []; test["ÅÄÖ"] = []; test["abc"] = []; test["ABC"] = []; test["test"] = []; test["Test"] = []; test["åäö"] = []; var sortedKeys = Object.keys(test).sort((a, b) => !/[az]/i.test(a) ? 1 : (/[az]/i.test(b) ? 0 : -1)); console.log(sortedKeys); 

Answer 2

Well your code seems to work. You should not use toLowerCase though.

Here i made a test for you.

 var test = []; test["ÅÄÖ"] = []; test["abc"] = []; test["ABC"] = []; test["test"] = []; test["Test"] = []; test["åäö"] = []; var data =Object.keys(test).sort(function(a,b){ return a.localeCompare(b); }); console.log(data); 

Answer 3

You can simply add the proper parameters to localeCompare like so:

 var test = []; test["ÅÄÖ"] = []; test["abc"] = []; test["ABC"] = []; test["test"] = []; test["Test"] = []; test["åäö"] = []; var r = Object.keys(test).sort((a, b) => a.localeCompare(b, "sv", {sensitivity: 'case'})); console.log(r); 

In this case we add sv for the Swedish locale and sensitivity: 'case' as the option.

Answer 4

I finally found a way that seems to work quite well, at least in new versions of Chrome, Safari and Opera. This question was very helpful: How to sort special letters (typescript)?

var test = [];
test["abc"] = [];
test["ABC"] = [];
test["test"] = [];
test["Test"] = [];
test["åäö"] = [];
test["ÅÄÖ"] = [];

var sortedKeys = Object.keys(test).sort(new Intl.Collator("sv", { usage: "sort" }).compare);

console.log(sortedKeys);

There's a jsfiddle here: https://jsfiddle.net/ryv4hjk5/