javascript sort with unicode

user_155639 0
Viewed 27994

There are a lot of examples for sorting some JSON array by some property (i.e. 'title') We are using compare function like this one:

function sortComparer(a, b) {
        if (a.title == b.title)
            return 0;
        return a1 > b1 ? 1 : -1;
    }

Problem is that Serbian Latin alphabet order looks like "A, B, C, Č, Ć, D,..." When using sortComparer above I am getting D sorted before "Č" or "Ć". Any idea how to sort respecting current culture language?

sorting javascript
3 Answers

For sorting an array with a custom setting do as following:

  1. Create an array with a custom order of alphabets:

    var alphabets = ["A", "B", "C", "Č", "Ć", "D","Dž","Đ","E","F","G","H","I","J","K","L","Lj","M","N","Nj","O","P","R","S", "ÛŒ","T","U","V","Z","Ž"];

  2. Create a list of test array:

    var testArrray = ["B2","D6","A1","Ć5","Č4","C3"];

  3. Create a sort function name:

    function OrderFunc(){
          testArrray.sort(function (a, b) {
              return CharCompare(a, b, 0);
          });
      }

  4. create the CharCompare function(index: sort "AAAB" before "AAAC"):

     function CharCompare(a, b, index) {
  if (index == a.length || index == b.length)
      return 0;
  //toUpperCase: isn't case sensitive
  var aChar = alphabets.indexOf(a.toUpperCase().charAt(index));
  var bChar = alphabets.indexOf(b.toUpperCase().charAt(index));
  if (aChar != bChar)
      return aChar - bChar
  else
      return CharCompare(a,b,index+1)
 }

  5. Call OrderFunc for sorting the testArray(the result will be : A1,B2,C3,Č4,Ć5,D6).

Test Online

Good Luck

user_74871350

Use The Intl.Collator like you will get perfect sorting result

function letterSort(lang, letters) {
  letters.sort(new Intl.Collator(lang).compare);
  return letters;
}

console.log(letterSort('gu', ['છ','ક','ખ']));
// expected output: Array ["a", "ä", "z"]

console.log(letterSort('sv', ['a','z','ä']));
// expected output: Array ["a", "z", "ä"]

More detail you can check here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Collator

user_7972410
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