How to create such an array with data?

Question

JavaScript

There is an array like:

[{value: 123, title: 'test'},{value: 321, title: 'test2'},{value: 1232312, title: 'test2'},{value: 5678, title: 'test2'}]

How to make such an array from it?

[
    {
      title: 'test',
      data: [
        {
          money: 123,
        },
      ],
    },
    {
      title: 'test2',
      data: [
        {
          money: 321,
        },
        {
          money: 1232312,
        },
        {
          money: 5678,
        },
      ],
    },
  ]

Answer 1

const groupedData = Object.values(data.reduce((acc, { title, value }) => {
  (acc[title] = acc[title] || { title, data: [] }).data.push({ money: value });
  return acc;
}, {}));

or

const groupedData = arr.reduce((acc, { title, value }) => {
  let g = acc.find(n => n.title === title);
  if (!g) {
    acc.push(g = { title, data: [] });
  }
  g.data.push({ money: value });
  return acc;
}, []);