Sum all properties in object

Question

I have the following object:

{\"speed\":299,\"equipment\":49,\"teleabb\":49,\"additional\":50,\"optional\":\"299\"}

I want to sum all this

Answer 1

1. Iterate over the object properties using for(var in)
2. Use parseInt since some of the integers are in string form

var obj = {"speed":299,"equipment":49,"teleabb":49,"additional":50,"optional":"299"};
var sum = 0;

for(var key in obj){
  sum += parseInt(obj[key]);
  }

document.write(sum);