How to remove undefined and null values from an object using lodash?
You can simply chain _.omit()
with _.isUndefined
and _.isNull
compositions, and get the result with lazy evaluation.
Demo
var result = _(my_object).omit(_.isUndefined).omit(_.isNull).value();
Update March 14, 2016:
As mentioned by dylants in the comment section, you should use the _.omitBy()
function since it uses a predicate instead of a property. You should use this for lodash version 4.0.0
and above.
DEMO
var result = _(my_object).omitBy(_.isUndefined).omitBy(_.isNull).value();
Update June 1, 2016:
As commented by Max Truxa, lodash already provided an alternative _.isNil
, which checks for both null
and undefined
:
var result = _.omitBy(my_object, _.isNil);
The correct answer is:
_.omitBy({ a: null, b: 1, c: undefined, d: false }, _.isNil)
That results in:
{b: 1, d: false}
The alternative given here by other people:
_.pickBy({ a: null, b: 1, c: undefined, d: false }, _.identity);
Will remove also false
values which is not desired here.
if you are using lodash, you can use _.compact(array)
to remove all falsely values from an array.
_.compact([0, 1, false, 2, '', 3]);
// => [1, 2, 3]
https://lodash.com/docs/4.17.4#compact
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}