Question

I have an array like this

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

Now I want to sort the the complete collection on the attribute order, so both the outer
as well as inner arrays should get sorted based on the attribute order.

The final output should look like this.

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

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.