4.17.11
3.10.1
2.4.2
1.3.1

_.update(object, path, updater)

sourcenpm package

This method is like _.set except that accepts updater to produce the value to set. Use _.updateWith to customize path creation. The updater is invoked with one argument: (value).

Note: This method mutates object.

Since

4.6.0

Arguments

argument
object
path
updater
type
Object
(Array|string)
Function
description
The object to modify.
The path of the property to set.
The function to produce the updated value.

Returns

(array)

Example

var object = { a: [{ b: { c: 3 } }] };

_.update(
  object,
  "a[0].b.c",
  function (n) {
    return n * n;
  }
);
console.log(object.a[0].b.c);
// => 9

_.update(
  object,
  "x[0].y.z",
  function (n) {
    return n ? n + 1 : 0;
  }
);
console.log(object.x[0].y.z);
// => 0

var object = { a: [{ b: { c: 3 } }] };

_.update(object, "a[0].b.c", function (n) {
  return n * n;
});
console.log(object.a[0].b.c);
// => 9

_.update(object, "x[0].y.z", function (n) {
  return n ? n + 1 : 0;
});
console.log(object.x[0].y.z);
// => 0