return the objects ordered by ranking and another to return the average ranking.

array_of_objects.js

var a  = [{name:'john',rank:10},{name:"Alex",rank:5}];
var avg_rank=0;

ordered_array = order_rank(a);
console.log(ordered_array);

avg = find_avg(a);
console.log(avg);

function order_rank(a){
 b = a.sort(function(x,y) { return x.rank - y.rank; })
return b;
}

function find_avg(a){
for (i=0;i<a.length;i++){
total = avg_rank+a[i].rank;
}
return(total/a.length);
}