classic-level

import { ClassicLevel } from 'classic-level'; import { rmSync } from 'node:fs'; const dbPath = './my-classic-level-db'; async function runExample() { // Clean up previous run if any try { rmSync(dbPath, { recursive: true, force: true }); } catch (e) {} // Create a database instance with JSON value encoding const db = new ClassicLevel(dbPath, { valueEncoding: 'json' }); try { // Open the database await db.open(); console.log('Database opened.'); // Add a single entry await db.put('user:1', { name: 'Alice', age: 30 }); console.log('Added user:1'); // Add multiple entries using batch operation await db.batch([ { type: 'put', key: 'user:2', value: { name: 'Bob', age: 25 } }, { type: 'put', key: 'user:3', value: { name: 'Charlie', age: 35 } } ]); console.log('Added user:2 and user:3 via batch'); // Retrieve a value const user1 = await db.get('user:1'); console.log('Retrieved user:1:', user1); // Iterate over entries with keys greater than 'user:1' console.log('Iterating users > user:1:'); for await (const [key, value] of db.iterator({ gt: 'user:1' })) { console.log(` Key: ${key}, Value:`, value); } } catch (error) { console.error('An error occurred:', error); } finally { // Close the database await db.close(); console.log('Database closed.'); } } runExample();