Change value using for in loop

Question

I am trying to write a for in loop function that changes any value that is greater than 20 to 0.

Here is what I have tried so far:

function greaterThan20(obj) {
  for (var key in obj) {
    if (obj[key] > 20) {
      obj[key] = 0;
    }
  }
  return obj
}

Answer 1

Try the following:

function greaterThan20(obj){
  for(var key in obj) {
      if(obj.hasOwnProperty(key)) {
          if(obj[key] > 20){
            obj[key] = 0;
          }
      }
  }
  return obj;
}
var obj = {'one':10,'two':25,'three':30}
console.log(greaterThan20(obj))