lru-map-cache

library0.1.0jsnpmunverified

A lightweight LRU cache implementation leveraging the native Map class for ordered iteration. Version 0.1.0 is stable with no recent updates. Differentiators: simple API, no dependencies, O(1) operations by exploiting Map's insertion order. Best for Node.js or browser projects needing a minimal LRU cache without additional features like TTL or serialization. Not recommended for high-concurrency or memory-sensitive environments.

storage

npm install lru-map-cache

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · LRU-MAP-CACHE

lru-map-cache

storagejavascriptv0.1.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

LRUCache

✓ import LRUCache from 'lru-map-cache'

✗ const LRUCache = require('lru-map-cache')

Package uses default export but does not provide TypeScript types.

LRUCache (CommonJS)

✓ const LRUCache = require('lru-map-cache')

✗ const { LRUCache } = require('lru-map-cache')

Named export does not exist in CommonJS; use default.

LRUCache (TypeScript)

✓ import LRUCache from 'lru-map-cache'

No type definitions included; consider @types/lru-map-cache or declare module manually.

Demonstrates creating an LRU cache with capacity 3, adding four items, and showing eviction of the least recently used key.

import LRUCache from 'lru-map-cache'; const cache = new LRUCache(3); cache.set('a', 1); cache.set('b', 2); cache.set('c', 3); cache.set('d', 4); console.log(cache.get('a')); // undefined console.log(cache.get('b')); // 2 console.log(cache.size()); // 3

Debug

Known issues

gotchaConstructor expects an integer capacity; passing undefined, null, or 0 may cause unexpected behavior (e.g., negative capacity if type coercion occurs).

fix

Always pass a positive integer to new LRUCache(capacity).

affects: >=0.1.0

deprecatedThe package has not been updated in over 2 years. Consider using more maintained alternatives like 'lru-cache' for bug fixes and features.

fix

Migrate to 'lru-cache' package which offers TTL, events, and TypeScript support.

affects: >=0.1.0

gotchaCache does not expose a 'delete' method that returns boolean; always deletes silently.

fix

Use cache.has(key) before delete if you need to check existence.

affects: >=0.1.0

Errors

Common errors & fixes

TypeError: LRUCache is not a constructor

Using require('lru-map-cache') returns an ES module default export which cannot be called with new.

fix

Use import LRUCache from 'lru-map-cache' or const LRUCache = require('lru-map-cache').default

ReferenceError: LRUCache is not defined

Missing import or require statement.

fix

Add import LRUCache from 'lru-map-cache' at top of file.

Upgrade

Version history

0.1.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

12 hits · last 30 days

node

Resources

githubhttps://github.com/helloanoop/lru-map-cache ↗

packagelru-map-cache ↗

homepagehttps://github.com/helloanoop/lru-map-cache#readme ↗