Code Snippets & Examples

import { useState, useEffect, useCallback, useMemo } from 'react';
import { User, onAuthStateChanged, signOut } from 'firebase/auth';
import { auth } from '../lib/firebase';

interface AuthState {
  user: User | null;
  loading: boolean;
  error: string | null;

import { useState, useEffect, useCallback } from 'react';

export function useDebounce(value, delay = 300) {
  const [debouncedValue, setDebouncedValue] = useState(value);

  useEffect(() => {
    const handler = setTimeout(() => {
      setDebouncedValue(value);

import { NextRequest, NextResponse } from 'next/server';
import { z } from 'zod';

// Request validation schema
const CreatePostSchema = z.object({
  title: z.string().min(1, 'Title is required').max(100, 'Title too long'),
  content: z.string().min(10, 'Content must be at least 10 characters'),
  tags: z.array(z.string()).optional(),

.responsive-grid {
  /* CSS Custom Properties for easy customization */
  --min-column-width: 300px;
  --gap: 1.5rem;
  --padding: 1rem;

  display: grid;
  grid-template-columns: repeat(

import { useState, useEffect, useRef } from 'react';
import { 
  collection, 
  doc, 
  onSnapshot, 
  query, 
  Query, 
  DocumentReference,

import logging
import time
from typing import List, Dict, Any, Callable, Optional
from dataclasses import dataclass
from concurrent.futures import ThreadPoolExecutor, as_completed
import json

# Configure logging