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

Use map() and foreach() to get desired output

const arr=[{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}];

let res = new Map();
arr.forEach((obj) => {
    let values = res.get(obj.name);
    if(!(values && values.value > obj.value)){ 
        res.set(obj.name, obj) 
    }
})
console.log(res);
console.log([...res])