| """ | |
| Streaming chat example with live token printing and usage tracking. | |
| Install: | |
| pip install openai | |
| Env: | |
| export OPENAI_API_KEY=sk-... | |
| """ |
| """ | |
| OpenAI API starter with a stable system prompt. | |
| Simple first-request pattern you can build on for chatbots, extractors, and agents. | |
| Install: | |
| pip install openai | |
| Env: | |
| export OPENAI_API_KEY=sk-... | |
| """ |
| // Tiny A/B testing helper — deterministic variant assignment, no external service. | |
| // Hash the user ID + experiment key, map to a variant based on weights. | |
| // Same user always gets the same variant; safe for SSR and client. | |
| type Weights = Record<string, number>; | |
| export interface Experiment<V extends string = string> { | |
| key: string; | |
| variants: Record<V, number>; // weights, any positive numbers; they're normalized | |
| // Optional: target only a subset of users (e.g. beta cohort). |
| // Reusable Flutter form field with consistent styling, validation, and error display. | |
| // Works with any StatefulWidget that uses Form + GlobalKey<FormState>. | |
| // | |
| // Usage: | |
| // final _formKey = GlobalKey<FormState>(); | |
| // | |
| // Form( | |
| // key: _formKey, | |
| // child: Column(children: [ | |
| // ValidatedField( |
| /* | |
| * OIDC Authorization Code flow + PKCE in ~100 lines of Node. | |
| * Demonstrates the three endpoints you need: | |
| * GET /login -> redirect to the provider's authorize URL | |
| * GET /callback -> exchange the auth code for tokens | |
| * GET /userinfo -> call the provider's userinfo endpoint | |
| * | |
| * Works with any OIDC-compliant provider (Auth0, Okta, Google, Keycloak, Cognito...). | |
| * | |
| * Install: |
| """ | |
| Playwright browser automation starter — patterns I keep reusing. | |
| Handles common real-world issues: iframes, nested iframes, canvas screenshots, | |
| humanlike dragging, and graceful install-on-first-run. | |
| Install: | |
| pip install playwright | |
| python -m playwright install | |
| """ |
| // Next.js App Router API route template — auth, Zod validation, typed errors. | |
| // File: app/api/posts/route.ts | |
| import { NextRequest, NextResponse } from "next/server"; | |
| import { z } from "zod"; | |
| import { headers } from "next/headers"; | |
| // --- Validation schemas --- | |
| const CreatePostSchema = z.object({ | |
| title: z.string().min(1).max(200), |
| """ | |
| OpenCV recipes I keep reaching for. | |
| Every function is self-contained — copy the ones you need. | |
| Install: | |
| pip install opencv-python numpy | |
| """ | |
| import cv2 | |
| import numpy as np |
Not a comprehensive list — just the ones that give me real lift on real projects. Each pattern is a tool; pick the one that fits the problem.
You are a senior SQL engineer.
Your task: rewrite the query below to use a window function instead of a self-join.
Constraints: preserve the exact column order. Do not change column names.
| """ | |
| Token counting + cost estimation for OpenAI API calls. | |
| Update the PRICING dict when prices change. | |
| Install: | |
| pip install tiktoken openai | |
| """ | |
| from dataclasses import dataclass | |
| import tiktoken |