Imagine I have
const obj = {
arr_a: [9, 3, 2],
arr_b: [1, 5, 0],
arr_c: [7, 18]
}
what's the best way to convert this object to a simple array like:
[9, 3, 2, 1, 5, 0, 7, 18]
I tried this:
[].concat(obj.arr_a, obj.arr_b, obj.arr_c)
But I wonder if there's something in lodash or underscore to do it. Something like:
_.flatAsArray(obj);
or:
obj.toFlatArray();
To get the values of all keys in object, you can use _.values.
With ES6
[].concat(..._.values(obj))
With _.flatten
_.flatten(_.values(obj))
You can use flatMap to get all these values.
var result = _.flatMap(obj);
const obj = {
arr_a: [9, 3, 2],
arr_b: [1, 5, 0],
arr_c: [7, 18]
};
var result = _.flatMap(obj);
console.log(result);<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>What about:
_.flatten(_.values(obj));
You could use Object.values and Array#reduce.
var obj = { arr_a: [9, 3, 2], arr_b: [1, 5, 0], arr_c: [7, 18] },
result = Object.values(obj).reduce((r, a) => r.concat(a));
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }You can use Object.values to iterate over the object values, reducing them using the spread operator
Object.values(obj).reduce((result, val) => [...result, ...val], [])
