Introduction to Lazy Cache

Lazy Cache is a simple but powerful library that helps improve your application’s performance by caching data and objects. It allows you to store the results of expensive operations and reuse them, which can significantly speed up your application.

Basic Usage

const lazyCache = require('lazy-cache');
const cache = lazyCache(require);

// Using the cache
cache('fetchData', function() {
  return fetch('https://api.example.com/data');
});

const fetchData = cache('fetchData');
fetchData().then(data => console.log(data));

Advanced Caching

const options = {
  maxAge: 1000 * 60 * 5, // 5 minutes
  preFetch: true
};

const cache = lazyCache(require, options);

cache('heavyOperation', function() {
  return someHeavyOperation();
});

const heavyOperation = cache('heavyOperation');
heavyOperation().then(result => console.log(result));

API Examples

Cache Initialization

const lazyCache = require('lazy-cache');
const cache = lazyCache(require);

Cache Method

cache('key', function() {
  return 'value';
});

const value = cache('key');
console.log(value); // 'value'

Handling Promise

cache('fetchSomething', async function() {
  const response = await fetch('https://api.example.com/something');
  return response.json();
});

const fetchSomething = cache('fetchSomething');
fetchSomething().then(data => console.log(data));

Using Multiple Caches

const cache1 = lazyCache(require);
const cache2 = lazyCache(require);

cache1('foo', function() {
  return 'bar';
});

cache2('hello', function() {
  return 'world';
});

console.log(cache1('foo')); // 'bar'
console.log(cache2('hello')); // 'world'

Complete Application Example

const express = require('express');
const lazyCache = require('lazy-cache');

const app = express();
const cache = lazyCache(require);

cache('getUserData', async function(user_id) {
  const response = await fetch(`https://api.example.com/users/${user_id}`);
  return response.json();
});

app.get('/user/:id', async (req, res) => {
  const userId = req.params.id;
  const getUserData = cache('getUserData');
  const data = await getUserData(userId);
  res.send(data);
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

With Lazy Cache, you can effortlessly enhance your application’s performance by caching and reusing the results of expensive operations. Whether you’re building a small app or a large-scale application, Lazy Cache can save you time and resources.

This feature extends beyond basic usage, offering advanced caching options that are customizable to suit your specific needs.

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