--- /dev/null
+/*!
+ * set-value <https://github.com/jonschlinkert/set-value>
+ *
+ * Copyright (c) 2014-2015, 2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+var split = require('split-string');
+var extend = require('extend-shallow');
+var isPlainObject = require('is-plain-object');
+var isObject = require('is-extendable');
+
+module.exports = function(obj, prop, val) {
+ if (!isObject(obj)) {
+ return obj;
+ }
+
+ if (Array.isArray(prop)) {
+ prop = [].concat.apply([], prop).join('.');
+ }
+
+ if (typeof prop !== 'string') {
+ return obj;
+ }
+
+ var keys = split(prop, {sep: '.', brackets: true}).filter(isValidKey);
+ var len = keys.length;
+ var idx = -1;
+ var current = obj;
+
+ while (++idx < len) {
+ var key = keys[idx];
+ if (idx !== len - 1) {
+ if (!isObject(current[key])) {
+ current[key] = {};
+ }
+ current = current[key];
+ continue;
+ }
+
+ if (isPlainObject(current[key]) && isPlainObject(val)) {
+ current[key] = extend({}, current[key], val);
+ } else {
+ current[key] = val;
+ }
+ }
+
+ return obj;
+};
+
+function isValidKey(key) {
+ return key !== '__proto__' && key !== 'constructor' && key !== 'prototype';
+}