Extending objects in array without redefining

Question

I've got an array of objects

var myArray = [{'id':'1','value':'firstValue'},{'id':'1','value':'secondValue'}, etc.]

I want to be able to extend the array later on in the code, so that I will have

var myArray = [{'id':'1','value':'firstValue', 'anothervalue':'anotherFirstValue'},{'id':'1','value':'secondValue', 'anothervalue':'anotherSecondValue'}, etc.]

Is there a way to do it without redefining myArray?

KevBot · Accepted Answer · 2017-04-06 19:24:00Z

1

You can map the array, and add to each object:

var myArray = [{
  'id': '1',
  'value': 'firstValue'
}, {
  'id': '1',
  'value': 'secondValue'
}];

//later on
myArray = myArray.map(function(obj) {
  obj.anothervalue = 'anotherFirstValue';
  return obj;
});

console.log(myArray);

answered Apr 6, 2017 at 19:24

KevBot

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2 Comments

Evgeny Over a year ago

Thank you! I guess I will then have to change individually each value for the newly created set?

KevBot Over a year ago

@Rockasaurus, depends on several things. You can often map other array data into a current array. Or, you can perform calculations in the map, and just add those to each value. Hopefully that makes sense.

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