Declarative macros (macro_rules!) let you write code that writes code, reducing boilerplate. They pattern-match on token trees and expand at compile time. I use them for repetitive patterns like implementing traits for multiple types or generating tes

A centralized API client provides a single place to configure authentication, error handling, and request/response transformations. I use axios for its interceptor support and automatic JSON transformation. Request interceptors attach the JWT token fr

Zustand provides a minimalist alternative to Redux with less boilerplate and better TypeScript support. I create stores with create that hold state and actions. Unlike Context, Zustand doesn't cause unnecessary re-renders—components only update when t

A single long-lived JWT is a liability: if it leaks, it’s valid until it expires and revocation is hard. I use short-lived access tokens and longer-lived refresh tokens, and I rotate refresh tokens on every use. Rotation means that if an attacker stea

SwiftUI revolutionizes iOS development with declarative syntax where you describe what the UI should look like based on state. Views automatically update when state changes using property wrappers like @State, @Binding, and @ObservedObject. The @State

The Canvas API provides a drawable bitmap surface for graphics. I use <canvas> elements with 2D rendering context via getContext('2d'). Drawing methods include fillRect(), strokeRect(), arc(), and lineTo(). The save() and restore() methods manag

HTML5 form validation uses attributes like required, pattern, min, max, and type to validate input. I leverage native validation before JavaScript. The <label> element associates text with inputs for accessibility. Input types like email, tel, u

Presence is usually overkill, but for collaboration features it’s valuable: show who’s online in a room. I identify connections with current_member in ApplicationCable::Connection, then in a channel I broadcast updates when members subscribe/unsubscri

Graphene brings GraphQL to Django. I define types mapping to models and create resolvers for queries and mutations. Clients request exactly the data they need, reducing over-fetching. I use DjangoObjectType for automatic schema generation from models.

Integration tests go in the tests/ directory and are compiled as separate binaries. Each file in tests/ is a separate test crate with access only to your crate's public API. This enforces API-level testing and catches issues that unit tests miss. I us

If you store flags/settings in JSONB, query performance hinges on indexing. Partial indexes are a great compromise: index only the rows that matter for the hot path (e.g., enabled flags).

When clients upload files directly to S3, your API avoids handling large payloads and you get better scalability. I generate a presigned PUT URL with a short expiry and a constrained object key prefix so users can’t overwrite arbitrary objects. The cr