javascript for loop changes original list variable

Question

I have a collection of objects called the response and I am creating another variable called object that\'s an empty object and creating object.array a

Answer 1

This line object.array = response is just pointing to same memory location. Create a fresh copy of the object and update value in that

function runThisLoop() {

  var response = [{
      name: 'Name A',
      age: 2
    },
    {
      name: 'Name B',
      age: 7
    }
  ]


  var object = {}
  object.array = JSON.parse(JSON.stringify(response));

  for (var val of object.array) {
    val.age = null
  }

  console.log("response", response)
  console.log("object.array", object.array)
}

runThisLoop()