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- 'use strict';
-
- var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
-
- module.exports = function mergeRecursive(items) {
- var merge = function merge(target, source) {
- var merged = {};
-
- var mergedKeys = Object.keys(Object.assign({}, target, source));
-
- mergedKeys.forEach(function (key) {
- if (target[key] === undefined && source[key] !== undefined) {
- merged[key] = source[key];
- } else if (target[key] !== undefined && source[key] === undefined) {
- merged[key] = target[key];
- } else if (target[key] !== undefined && source[key] !== undefined) {
- if (target[key] === source[key]) {
- merged[key] = target[key];
- } else if (!Array.isArray(target[key]) && _typeof(target[key]) === 'object' && !Array.isArray(source[key]) && _typeof(source[key]) === 'object') {
- merged[key] = merge(target[key], source[key]);
- } else {
- merged[key] = [].concat(target[key], source[key]);
- }
- }
- });
-
- return merged;
- };
-
- if (!items) {
- return this;
- }
-
- if (items.constructor.name === 'Collection') {
- return new this.constructor(merge(this.items, items.all()));
- }
-
- return new this.constructor(merge(this.items, items));
- };
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