node-modules
ylru
hashlru inspired
hashlru is the Simpler, faster LRU cache algorithm. Please checkout algorithm and complexity on hashlru.
ylru extends some features base on hashlru:
- cache value can be expired.
- cache value can be empty value, e.g.:
null,undefined,'',0
Usage
import { LRU } from 'ylru';
const lru = new LRU(100);
lru.set(key, value);
lru.get(key);
// value2 will be expired after 5000ms
lru.set(key2, value2, { maxAge: 5000 });
// get key and update expired
lru.get(key2, { maxAge: 5000 });API
new LRU(max) => lru
initialize a lru object.
lru.get(key[, options]) => value | null
{Number} options.maxAge: update expire time when get, value will becomeundefinedaftermaxAgepass.
Returns the value in the cache.
lru.set(key, value[, options])
{Number} options.maxAge: value will becomeundefinedaftermaxAgepass. IfmaxAgenot set, value will be never expired.
Set the value for key.
lru.keys()
Get all unexpired cache keys from lru, due to the strategy of ylru, the keys' length may greater than max.
const lru = new LRU(3);
lru.set('key 1', 'value 1');
lru.set('key 2', 'value 2');
lru.set('key 3', 'value 3');
lru.set('key 4', 'value 4');
lru.keys(); // [ 'key 4', 'key 1', 'key 2', 'key 3']
// cache: {
// 'key 4': 'value 4',
// }
// _cache: {
// 'key 1': 'value 1',
// 'key 2': 'value 2',
// 'key 3': 'value 3',
// }lru.reset()
reset a lru object.
const lru = new LRU(3);
lru.set('key 1', 'value 1');
lru.set('key 2', 'value 2');
lru.set('key 3', 'value 3');
lru.set('key 4', 'value 4');
lru.reset();
// cache: {
// }
// _cache: {
// }
lru.keys().length === 0;License
Contributors
 fengmk2 |
 dominictarr |
 dead-horse |
 thonatos |
 mourner |
 semantic-release-bot |
|---|---|---|---|---|---|
 vagusX |
 RaoHai |
This project follows the git-contributor spec, auto updated at Thu Mar 28 2024 11:52:18 GMT+0800.