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jquery - How to sum two object values in javascript

I'm stuck how i sum two object like this:

obj1 = { 
  'over_due_data': 10,
  'text_data': 5
} 

obj2 = {
  'over_due_data': 20,
  'text_data': 5
}

I went this output

obj = {
  'over_due_data': 30,
  'text_data': 10
}

One more thing, don't use a for loop, merge and extend. Is it possible to sum two objects?

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by (71.8m points)

try with simply use Object.keys() and Array#map() function

obj1 = {
  'over_due_data': 10,
  'text_data': 5
}
obj2 = {
  'over_due_data': 20,
  'text_data': 5
}
var obj ={}
Object.keys(obj1).forEach(function(a){
  obj[a] = obj1[a] +obj2[a]

})
console.log(obj)

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