JS: Filter array of objects by max value per category

Question

What is most efficient / elegant way to achieve sql-like filtering effect. I want to filter them and get only that objects which are max value in some group.

This is

Answer 1

Doing this in stages.

1. get a set of names
2. create a sorted array in descending order
3. then just map using find to get the first one

Below is an example.

const input = [{"name":"bathroom","value":54,"timeStamp":1562318089713},{"name":"bathroom","value":55,"timeStamp":1562318090807},{"name":"bedroom","value":48,"timeStamp":1562318092084},{"name":"bedroom","value":49,"timeStamp":1562318092223},{"name":"room","value":41,"timeStamp":1562318093467}];

const output = [...new Set(input.map(m => m.name))].
  map(m => [...input].sort(
    (a,b) => b.value - a.value).
    find(x => m === x.name));
  
console.log(output);