How to remove undefined and null values from an object using lodash?

Question

I have a Javascript object like:

var my_object = { a:undefined, b:2, c:4, d:undefined };

How to remove all the undefined properties? False attributes should stay.

Answer 1

If you want to remove all falsey values then the most compact way is:

For Lodash 4.x and later:

_.pickBy({ a: null, b: 1, c: undefined }, _.identity);
>> Object {b: 1}

For legacy Lodash 3.x:

_.pick(obj, _.identity);

_.pick({ a: null, b: 1, c: undefined }, _.identity);
>> Object {b: 1}