Group by element in array by keyword

Question

I am developing an application on AngularJS (1) and I can not figure out how to split array of items in another array group by item.

I mean I have an array of different

Answer 1

You could use a hash table and collect the object in the arrays of the hash table.

var array = [{ name: "toto", uuid: 1111 }, { name: "tata", uuid: 2222 }, { name: "titi", uuid: 1111 }],
    hash = Object.create(null),
    result = [];

array.forEach(function (a) {
    if (!hash[a.uuid]) {
        hash[a.uuid] = [];
        result.push(hash[a.uuid]);
    }
    hash[a.uuid].push(a);
});

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }