Lodash - filter by string 1,2 - filter

Question

I have string
"1,2" // which is from the db.field
I am trying to filter with lodash and some thing like the following worked
_.filter(jsonArray, function(res) { return (res.id == 1 || res.id == 2); });
Please assume jsonArray as follows:
[
{ 'id': '1', 'age': 60 },
{ 'id': '2', 'age': 70 },
{ 'id': '3', 'age': 22 },
{ 'id': '4', 'age': 33 }
];
here the problem is I need to split the sting 1,2 and apply,
But note that 1,2 is not always 1,2 - it could be 1,2,3 and this string is dynamic from db.field.
Now I am searching if there is any way I can just use the string say like
-.filter(jsonArray, function(res){ return res.id <is equal to one of the value in 1,2,3,4 >})
I think its obvious the split this string into array and ... but I am not sure of doing it, help it out please.

Answer 1

You first need to split db.field to make it as array of ids that can be evaluated easily when matching items. Next, use the filter() that you've already constructed to check if such items match the ids using includes.
var ids = db.field.split(',').map(Number);
var result = _.filter(jsonArray, function(res) {
return _.includes(ids, res.id);
});
var db = { field: '1,2' };
var jsonArray = [
{ 'id': 1, 'age': 60 },
{ 'id': 2, 'age': 70 },
{ 'id': 3, 'age': 22 },
{ 'id': 4, 'age': 33 }
];
var ids = db.field.split(',').map(Number);
var result = _.filter(jsonArray, function(res) {
return _.includes(ids, res.id);
});
document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');
<script src="https://cdn.jsdelivr.net/lodash/4.12.0/lodash.min.js"></script>