Difference between sort(), sort(function(a,b){return a-b;}); and sort(function(a,b){…})

Question

I am trying to understand how exactly sort() works and how I am supposed to use it.

I did some research (google) and went through the similar questions here on stackover

Answer 1

First of all, you did a good research and covered almost all possible cases, and you can find the MDN documentation here

You just missed the case of Sorting non-ASCII characters

For sorting strings with non-ASCII characters, i.e. strings with accented characters (e, é, è, a, ä, etc.), strings from languages other than English: use String.localeCompare. This function can compare those characters so they appear in the right order.

var items = ['réservé', 'premier', 'cliché', 'communiqué', 'café', 'adieu'];
items.sort(function (a, b) {
  return a.localeCompare(b);
});

// items is ['adieu', 'café', 'cliché', 'communiqué', 'premier', 'réservé']