| // | |
| 'use strict'; | |
| function cacheWrapper (cache , key , fn ) { | |
| if (!cache) { | |
| return fn(); | |
| } | |
| const cached = cache.get(key); | |
| if (cached !== undefined) { | |
| return cached; | |
| } | |
| const result = fn(); | |
| cache.set(key, result); | |
| return result; | |
| } | |
| module.exports = cacheWrapper; |