get distinct objects from an array based on a subset of keys

Question

I've written some code that is yielding the desired results but it seems verbose. The code gets the distinct objects from an array of objects when looking at only a subset of the keys. Is there a more concise way to write the code to get the same output?

const source = [
    {"id":"1","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"A12","item":"celery"},
    {"id":"2","department":"hardware","storeLocation":"mall","shelf":"57","slot":"452","item":"flashlights"},
    {"id":"3","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"B17","item":"cabbage"},
    {"id":"4","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"D28","item":"lettuce"},
    {"id":"5","department":"hardware","storeLocation":"mall","shelf":"57","slot":"493","item":"duct tape"}
];

const distinctCombinations = {};
source.forEach(o => {
    distinctCombinations[o.storeLocation] = { storeLocation: o.storeLocation, department: o.department, shelf: o.shelf }
});

const result = Object.values(distinctCombinations);

console.log(result);

Answer 1

Here is what I came up with:

const source = [
    {"id":"1","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"A12","item":"celery"},
    {"id":"2","department":"hardware","storeLocation":"mall","shelf":"57","slot":"452","item":"flashlights"},
    {"id":"3","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"B17","item":"cabbage"},
    {"id":"4","department":"grocery","storeLocation":"downtown","shelf":"21","slot":"D28","item":"lettuce"},
    {"id":"5","department":"hardware","storeLocation":"mall","shelf":"57","slot":"493","item":"duct tape"}
];

const distinctCombinations = [...new Set(source.map(o => JSON.stringify(o, ['storeLocation', 'department', 'shelf'])))].map(o => JSON.parse(o));

console.log(distinctCombinations);