The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/ui/id.js
addon-sdk/source/lib/sdk/ui/id.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:530a8245fd47 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 'use strict'; | |
| 5 | |
| 6 module.metadata = { | |
| 7 'stability': 'experimental' | |
| 8 }; | |
| 9 | |
| 10 const method = require('../../method/core'); | |
| 11 const { uuid } = require('../util/uuid'); | |
| 12 | |
| 13 // NOTE: use lang/functional memoize when it is updated to use WeakMap | |
| 14 function memoize(f) { | |
| 15 const memo = new WeakMap(); | |
| 16 | |
| 17 return function memoizer(o) { | |
| 18 let key = o; | |
| 19 if (!memo.has(key)) | |
| 20 memo.set(key, f.apply(this, arguments)); | |
| 21 return memo.get(key); | |
| 22 }; | |
| 23 } | |
| 24 | |
| 25 let identify = method('identify'); | |
| 26 identify.define(Object, memoize(function() { return uuid(); })); | |
| 27 exports.identify = identify; |
