How To sort an array of nested objects in javascript

Question

I have an array like this

var array = [{
    order: 3,
    sub - array: [{
        order: 2
    },{
        order: 1
    }]
},{
    order: 2,
    sub - array         


        

Answer 1

var propertySort = function(a, b){
    return a.order > b.order ? 1 : (a.order < b.order ? -1 : 0);
    }

var reorder = function(arr){
    var l = arr.length;
    while (l--){
        if (arr[l]['sub-array']){
            reorder(arr[l]['sub-array']);
        }
    }
arr.sort(propertySort);
};

reorder(arr);

console.log(arr);

This should re-order the array for any number of nested levels.

Answer 2

Use Array.prototype.sort and call it on array and subsequently on each element of array with an appropriate compare function. Something like this should work:

array.sort(function (e1, e2) {
  return (e1.order - e2.order);
});

array.forEach(function(e) {
  e["sub-array"].sort(function (e1, e2) {
    return (e1.order - e2.order);
  });
});