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version][npm-image]][npm-url]\n[](https://github.com/node-modules/ylru/actions/workflows/nodejs.yml)\n[![Test coverage][codecov-image]][codecov-url]\n[![Known Vulnerabilities][snyk-image]][snyk-url]\n[![npm download][download-image]][download-url]\n\n[npm-image]: https://img.shields.io/npm/v/ylru.svg?style=flat-square\n[npm-url]: https://npmjs.org/package/ylru\n[codecov-image]: https://img.shields.io/codecov/c/github/node-modules/ylru.svg?style=flat-square\n[codecov-url]: https://codecov.io/github/node-modules/ylru?branch=master\n[snyk-image]: https://snyk.io/test/npm/ylru/badge.svg?style=flat-square\n[snyk-url]: https://snyk.io/test/npm/ylru\n[download-image]: https://img.shields.io/npm/dm/ylru.svg?style=flat-square\n[download-url]: https://npmjs.org/package/ylru\n\n**hashlru inspired**\n\n[hashlru](https://github.com/dominictarr/hashlru) is the **Simpler, faster LRU cache algorithm.**\nPlease checkout [algorithm](https://github.com/dominictarr/hashlru#algorithm) and [complexity](https://github.com/dominictarr/hashlru#complexity) on hashlru.\n\nylru extends some features base on hashlru:\n\n- cache value can be **expired**.\n- cache value can be **empty value**, e.g.: `null`, `undefined`, `''`, `0`\n\n## Usage\n\n```ts\nimport { LRU } from 'ylru';\n\nconst lru = new LRU(100);\nlru.set(key, value);\nlru.get(key);\n\n// value2 will be expired after 5000ms\nlru.set(key2, value2, { maxAge: 5000 });\n// get key and update expired\nlru.get(key2, { maxAge: 5000 });\n```\n\n### API\n\n## new LRU(max) => lru\n\ninitialize a lru object.\n\n### lru.get(key[, options]) => value | null\n\n- `{Number} options.maxAge`: update expire time when get, value will become `undefined` after `maxAge` pass.\n\nReturns the value in the cache.\n\n### lru.set(key, value[, options])\n\n- `{Number} options.maxAge`: value will become `undefined` after `maxAge` pass.\nIf `maxAge` not set, value will be never expired.\n\nSet the value for key.\n\n### lru.keys()\n\nGet all unexpired cache keys from lru, due to the strategy of ylru, the `keys`' length may greater than `max`.\n\n```ts\nconst lru = new LRU(3);\n\nlru.set('key 1', 'value 1');\nlru.set('key 2', 'value 2');\nlru.set('key 3', 'value 3');\nlru.set('key 4', 'value 4');\n\nlru.keys(); // [ 'key 4', 'key 1', 'key 2', 'key 3']\n// cache: {\n// 'key 4': 'value 4',\n// }\n// _cache: {\n// 'key 1': 'value 1',\n// 'key 2': 'value 2',\n// 'key 3': 'value 3',\n// }\n```\n\n### lru.reset()\n\nreset a lru object.\n\n```ts\nconst lru = new LRU(3);\n\nlru.set('key 1', 'value 1');\nlru.set('key 2', 'value 2');\nlru.set('key 3', 'value 3');\nlru.set('key 4', 'value 4');\n\nlru.reset();\n// cache: {\n// }\n// _cache: {\n// }\n\nlru.keys().length === 0;\n```\n\n## License\n\n[MIT](LICENSE)\n\n\n\n## Contributors\n\n|[![](\"https://avatars.githubusercontent.com/u/156269?v=4\")
fengmk2](https://github.com/fengmk2)
|[![](\"https://avatars.githubusercontent.com/u/259374?v=4\")
dominictarr](https://github.com/dominictarr)
|[![](\"https://avatars.githubusercontent.com/u/985607?v=4\")
dead-horse](https://github.com/dead-horse)
|[![](\"https://avatars.githubusercontent.com/u/958063?v=4\")
thonatos](https://github.com/thonatos)
|[![](\"https://avatars.githubusercontent.com/u/25395?v=4\")
mourner](https://github.com/mourner)
|[![](\"https://avatars.githubusercontent.com/u/32174276?v=4\")
semantic-release-bot](https://github.com/semantic-release-bot)
|\n| :---: | :---: | :---: | :---: | :---: | :---: |\n[![](\"https://avatars.githubusercontent.com/u/6828924?v=4\")
vagusX](https://github.com/vagusX)
|[![](\"https://avatars.githubusercontent.com/u/566097?v=4\")
RaoHai](https://github.com/RaoHai)
\n\nThis project follows the git-contributor [spec](https://github.com/xudafeng/git-contributor), auto updated at `Thu Mar 28 2024 11:52:18 GMT+0800`.\n\n\n","_attachments":{},"homepage":"https://github.com/node-modules/ylru","bugs":{"url":"https://github.com/node-modules/ylru/issues"},"license":"MIT"}