Lodash: Filter array of objects and check if not null

Question

I just started using lodash and have this array of objects, where one of the properties either has an integer or is null. I know how to filter the array for items that are null, but how do I check if it's not null?

Let's say I have something like this:

var users = [
    { 'user': 'barney', 'default': 1 },
    { 'user': 'dino', 'default': 0 },
    { 'user': 'wilma', 'default': 1 },
    { 'user': 'fred',   'default': null }
];

And then I want something like:

var notNullDefault = _.filter(sourceData, ['is_default', ! null ]); // objects with names barney, dino, wilma
var nullDefault = _.filter(sourceData, ['is_default', null ]); // object with name fred

Again, I'm new to lodash, so maybe there's a better way to accomplish this too.

Thanks in advance.

Answer 1

This can be solved with _.reject and _.filter:

var notNullDefault = _.reject(sourceData, ['default', null]);

var nullDefault = _.filter(sourceData, ['default', null]);

DEMO