D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
opt
/
alt
/
alt-nodejs8
/
root
/
lib
/
node_modules
/
npm
/
node_modules.bundled
/
mem
/
Filename :
index.js
back
Copy
'use strict'; const mimicFn = require('mimic-fn'); const cacheStore = new WeakMap(); const defaultCacheKey = function (x) { if (arguments.length === 1 && (x === null || x === undefined || (typeof x !== 'function' && typeof x !== 'object'))) { return x; } return JSON.stringify(arguments); }; module.exports = (fn, opts) => { opts = Object.assign({ cacheKey: defaultCacheKey, cache: new Map() }, opts); const memoized = function () { const cache = cacheStore.get(memoized); const key = opts.cacheKey.apply(null, arguments); if (cache.has(key)) { const c = cache.get(key); if (typeof opts.maxAge !== 'number' || Date.now() < c.maxAge) { return c.data; } } const ret = fn.apply(null, arguments); cache.set(key, { data: ret, maxAge: Date.now() + (opts.maxAge || 0) }); return ret; }; mimicFn(memoized, fn); cacheStore.set(memoized, opts.cache); return memoized; }; module.exports.clear = fn => { const cache = cacheStore.get(fn); if (cache && typeof cache.clear === 'function') { cache.clear(); } };