Script to groupBy and Sort

groupByAndReturnMax.js

const params = [
  {
      name: 'p1',
      timestamp: 12
  },
  {
      name: 'p1',
      timestamp: 13
  },
  {
      name: 'p2',
      timestamp: 12
  },
  {
      name: 'p2',
      timestamp: 13
  }
]

const newParams = params.sort((a, b) => 
  b.timestamp - a.timestamp
)

console.log(newParams[0])

function groupBy(key) {
  return function group(array) {
    return array.reduce((acc, obj) => {
      const property = obj[key];
      acc[property] = acc[property] || [];
      acc[property].push(obj);
      return acc;
    }, {});
  };
}
const groupByName = groupBy('name');
const teste = groupByName(params);
let final = []
Object.values(teste).forEach(e => {
  console.log(e)
  final.push(e.sort((a, b) => 
  b.timestamp - a.timestamp
)[0]);
})
console.log(teste)
console.log(final)