Javascript array sort and unique

Question

I have a JavaScript array like this:

var myData=['237','124','255','124','366','255']; 

I need the array elements to be unique and sorted:

myData[0]='124'; myData[1]='237'; myData[2]='255'; myData[3]='366'; 

Even though the members of array look like integers, they're not integers, since I have already converted each to be string:

var myData[0]=num.toString(); //...and so on. 

Is there any way to do all of these tasks in JavaScript?

Answer 1

This is actually very simple. It is much easier to find unique values, if the values are sorted first:

function sort_unique(arr) {   if (arr.length === 0) return arr;   arr = arr.sort(function (a, b) { return a*1 - b*1; });   var ret = [arr[0]];   for (var i = 1; i < arr.length; i++) { //Start loop at 1: arr[0] can never be a duplicate     if (arr[i-1] !== arr[i]) {       ret.push(arr[i]);     }   }   return ret; } console.log(sort_unique(['237','124','255','124','366','255'])); //["124", "237", "255", "366"] 

Answer 2

This might be adequate in circumstances where you can't define the function in advance (like in a bookmarklet):

myData.sort().filter(function(el,i,a){return i===a.indexOf(el)})