Sum-items-in-an-array.js

// data
var data = [{"name":"ramu","id":"719","gmail":"[email protected]","ph":988989898,"points":36},
        {"name":"ravi","id":"445","gmail":"[email protected]","ph":4554545454,"points":122},
        {"name":"karthik","id":"866","gmail":"[email protected]","ph":2332233232,"points":25}]          

// sum all data in points 
var result = data.reduce(function(tot, arr) { 
  // return the sum with previous value
  return tot + arr.points;

  // set initial value as 0
},0);

console.log(result);