node-modules/ylru

Name: ylru

Owner: node_modules

Description: Add "expire", "allow set empty value" extends on hashlru

Forked from: dominictarr/hashlru

Created: 2016-12-29 03:42:03.0

Updated: 2018-04-27 01:39:10.0

Pushed: 2017-07-18 04:32:44.0

Homepage:

Size: 18

Language: JavaScript

GitHub Committers

User	Most Recent Commit	# Commits

Other Committers

User	Email	Most Recent Commit	# Commits

README

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

t LRU = require('ylru');

t lru = new LRU(100);
set(key, value);
get(key);

alue2 will be expired after 5000ms
set(key2, value2, { maxAge: 5000 });
et key and update expired
get(key2, { maxAge: 5000 });

API

LRU(max) => lru

initialize a lru object.

lru.get(key[, options]) => value | null

• {Number} options.maxAge: update expire time when get, value will become undefined after maxAge pass.

Returns the value in the cache.

lru.set(key, value[, options])

• {Number} options.maxAge: value will become undefined after maxAge pass. If maxAge not 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.

t lru = new LRU(3);
set('key 1', 'value 1');
set('key 2', 'value 2');
set('key 3', 'value 3');
set('key 4', 'value 4');

keys(); // [ 'key 4', 'key 1', 'key 2', 'key 3']
ache: {
 'key 4': 'value 4',

cache: {
 'key 1': 'value 1',
 'key 2': 'value 2',
 'key 3': 'value 3',

License

MIT