HORIZON PROJECT

var baseUpdate = require('./_baseUpdate'),

    castFunction = require('./_castFunction');

/**

 * 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`.

 *

 * @static

 * @memberOf _

 * @since 4.6.0

 * @category Object

 * @param {Object} object The object to modify.

 * @param {Array|string} path The path of the property to set.

 * @param {Function} updater The function to produce the updated value.

 * @returns {Object} Returns `object`.

 * @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

 */

function update(object, path, updater) {

  return object == null ? object : baseUpdate(object, path, castFunction(updater));

}

module.exports = update;