javascript - Iterating over an array of objects -

i want iterate on array of objects in order oldest person , youngest person. how that? looks easy task, there no way can ages simple each loop. ideas?

var p = [     { name : "billy", age : 5 },     { name : "lucy", age : 31 },     { name : "jonny", age : 11 },     { name : "wolfgang", age : 78 },     { name : "robert", age : 23 } ]; 

i have seen this didn't me in understanding problem.

simple loop

var high = 0,     low;  //start @ 0 index, iterate until array length, iterate 1 (var = 0; < p.length; i++) {     //checking high     if (p[i].age > high)         high = p[i].age;      //checking low     if (p[i].age < low || low == null)         low = p[i].age; }