如何使用 js 对象遍历数组并有条件地替换值

Question

New to the programming game, I have an array with a small list of js-objects containing responses for personality test questions.

Each response is related to a personality factor, has a question, describes wether this correlates positively or negatively with the factor, and finally the response on a scale from 1-5.

I need to loop through the array and whenever the key positive has a value of 0, I want to flip the response so that a 1 = 5, 2 = 4, 3 = 3, 4 = 2, 5 = 1.

const response = [
  {
    factor: "conscientinous",
    question: "Prepare for things in advance",
    positiv: 1,
    rating: 3,
  },  
{
    factor: "conscientious",
    question: "Let things get into a mess",
    positiv: 0,
    rating: 1,
  },
];

I am trying to do this within a functional paradigm and was thinking.map might be a way forward.

Answer 1

Iterate the array with Array.map() , and if positiv is 0, return a new object by spreading the original object, and getting the new rating by substracting the old rating from 6:

 const response = [{"factor":"conscientinous","question":"Prepare for things in advance","positiv":1,"rating":3},{"factor":"conscientious","question":"Let things get into a mess","positiv":0,"rating":1}]; const result = response.map(o => o.positive? o: {...o, rating: 6 - o.rating }) console.log(result);