| "use strict"; |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| /** |
| * Check if the variable contains an object stricly rejecting arrays |
| * @param obj an object |
| * @returns `true` if obj is an object |
| */ |
| function isObjectNotArray(obj) { |
| return typeof obj === 'object' && !Array.isArray(obj); |
| } |
| exports.isObjectNotArray = isObjectNotArray; |
| /** |
| * Pure function - doesn't mutate either parameter! |
| * Merges two objects together deeply, overwriting the properties in first with the properties in second |
| * @param first The first object |
| * @param second The second object |
| * @returns a new object |
| */ |
| function deepMerge(first = {}, second = {}) { |
| // get the unique set of keys across both objects |
| const keys = new Set(Object.keys(first).concat(Object.keys(second))); |
| return Array.from(keys).reduce((acc, key) => { |
| const firstHasKey = key in first; |
| const secondHasKey = key in second; |
| if (firstHasKey && secondHasKey) { |
| if (isObjectNotArray(first[key]) && isObjectNotArray(second[key])) { |
| // object type |
| acc[key] = deepMerge(first[key], second[key]); |
| } |
| else { |
| // value type |
| acc[key] = second[key]; |
| } |
| } |
| else if (firstHasKey) { |
| acc[key] = first[key]; |
| } |
| else { |
| acc[key] = second[key]; |
| } |
| return acc; |
| }, {}); |
| } |
| exports.deepMerge = deepMerge; |
| //# sourceMappingURL=deepMerge.js.map |
