quick-lru

Set and Get Items

This feature allows you to set and retrieve items from the cache using the 'set' and 'get' methods. The 'maxSize' option specifies the maximum number of items the cache can hold.

{"const QuickLRU = require('quick-lru');
const lru = new QuickLRU({maxSize: 1000});
lru.set('key', 'value');
const value = lru.get('key'); // 'value'"}

Cache Eviction

This feature automatically evicts the least-recently-used items when the cache reaches its maximum size. In this example, after adding three items to a cache with a maxSize of 2, the first item is evicted.

{"const QuickLRU = require('quick-lru');
const lru = new QuickLRU({maxSize: 2});
lru.set('a', 1);
lru.set('b', 2);
lru.set('c', 3);
// At this point, 'a' is evicted because it is the least recently used item"}

Cache Deletion and Clearing

This feature allows you to delete individual items or clear the entire cache. The 'delete' method removes a specific item, and the 'clear' method removes all items.

{"const QuickLRU = require('quick-lru');
const lru = new QuickLRU({maxSize: 1000});
lru.set('key', 'value');
lru.delete('key'); // Removes 'key' from the cache
lru.clear(); // Removes all items from the cache"}

Cache Size and Existence Check

This feature provides methods to check the current size of the cache and whether a specific key exists in the cache. The 'size' property gives the number of items in the cache, and the 'has' method checks for the existence of a key.

{"const QuickLRU = require('quick-lru');
const lru = new QuickLRU({maxSize: 1000});
lru.set('key', 'value');
const size = lru.size; // 1
const hasKey = lru.has('key'); // true"}