Grokking Node.js Design Patterns for Interviews/

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Bridge Callback and Promise APIs

Bridge Callback and Promise APIs

Wrap a legacy callback-based client so it can be used with async/await.

We'll cover the following...

Problem statement

Your system relies on a legacy database client that still uses Node.js-style callbacks:

db.query('SELECT * FROM users', (err, result) => { ... });

Modern code in your app, however, uses async/await everywhere. Mixing both styles ...