Filter an array of objects via another integer array

Question

I have an array of objects that I get from an ajax call, each object has properties like in this example:

Name: Bob Dylan

Value: 452342

I also have an inclusion array of values, that if not empty I need to filter the array of objects above to contain only the ones with values from the inclusion array.

Update: Example of inclusion array is simply: [452342, 4563546,34563,34563456,345634]

My best guess was to have 2 loops, outer one going through the array of objects and inner one checking if they exist in the inclusion list, and if not slicing that object. Is there a better, less laborious way of doing this?

can you provide an example of what does contains your inclusion array ? — ChainList
– ChainList, Commented Jun 2, 2015 at 15:12
Arrays have a .filter method, you can use .includes (or .indexOf if you're on old browsers and/or don't want to polyfill) to check for membership in the other array after .maping to a property. — Benjamin Gruenbaum
– Benjamin Gruenbaum, Commented Jun 2, 2015 at 15:13
Does the inclusion array contain the same object references than the array of objects? Or only objects which look like the same? — Oriol
– Oriol, Commented Jun 2, 2015 at 15:14
Providing a sample of the actual return data would be very helpful in being able to successfully answer your question. — talemyn
– talemyn, Commented Jun 2, 2015 at 15:18
Updated with example of inclusion array, changed some wording to be more clear. — Thufir Hawat
– Thufir Hawat, Commented Jun 2, 2015 at 15:23

Community · Accepted Answer · 2017-05-23 10:30:00Z

1

Use array.filter method and then the filter method.

function isInInclusion(value) {
  var inclusionArray = [2, 130, 12];
  return inclusionArray.indexOf(value) >= 0;
};

var filtered = [12, 5, 8, 130, 44].filter(isInInclusion);

Here you have some references depends what you're using (jquery, mootools, and so on) : How do I check if an array includes an object in JavaScript?

edited May 23, 2017 at 10:30

CommunityBot

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answered Jun 2, 2015 at 15:18

Razvan Dumitru

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2 Comments

Thufir Hawat Over a year ago

This answer is the closest, I was able to get this to work by replacing [12, 5, 8, 130, 44] with my array of objects and changing return inclusionArray.indexOf(value) >= 0; to return inclusionArray.indexOf(value.Value) >= 0;

Razvan Dumitru Over a year ago

Of course. I provided you an example as i didn't know your data structure.

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