Daily micro-tips for C#, SQL, performance, and scalable backend engineering.
📝 Records = Immutable Data Classes are mutable. Records are immutable. Value-based equality, concise syntax, data-centric. ❌ Class (Mutable) public class Person { public string Name { get; set; } public int Age { get; set; } } ✅ Record (Immutable) public record Person(string Name, int Age); 📝 Record Features // Positional record public record […]
📁 Indexers = Array-Like Access Custom collections need array access. Indexers provide array-like syntax. Clean, intuitive, flexible. 📝 Indexer Basics // Simple indexer public class StringCollection { private string[] _items = new string[10]; public string this[int index] { get => _items[index]; set => _items[index] = value; } } // Usage var collection = new StringCollection(); […]
🔔 Triggers = Automated Actions Need to automate database actions? Triggers run automatically. Audit logs, data validation, synchronization. 📝 Trigger Basics — Audit trigger (INSERT) CREATE TRIGGER user_audit_insert ON users AFTER INSERT AS BEGIN INSERT INTO audit_log (action, table_name, record_id, changed_by, changed_at) SELECT ‘INSERT’, ‘users’, id, SYSTEM_USER, GETDATE() FROM inserted; END; — Audit trigger (UPDATE) […]
🔐 CORS = API Security Browsers block cross-origin requests. CORS configuration enables secure API access. Essential for modern APIs. 📝 CORS Setup // Program.cs var builder = WebApplication.CreateBuilder(args); // Add CORS policy builder.Services.AddCors(options => { options.AddPolicy(“AllowSpecificOrigin”, builder => { builder.WithOrigins(“https://myapp.com”) .AllowAnyMethod() .AllowAnyHeader() .AllowCredentials(); }); options.AddPolicy(“AllowAll”, builder => { builder.AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader(); }); options.AddPolicy(“AllowMultipleOrigins”, builder => […]
📋 Git Log = Commit History Need to see what changed? Git log shows commit history. Track changes, find bugs, understand code. 📝 Git Log Commands # Basic log git log # One line per commit git log –oneline # Show graph git log –graph git log –graph –oneline # Show changes git log -p […]
🔧 Interceptors = Request/Response Control Every request needs handling. Interceptors process requests/responses. Auth, logging, retries — centralized. 📝 Axios Interceptors import axios from ‘axios’; // Request interceptor axios.interceptors.request.use( config => { // Add auth token const token = localStorage.getItem(‘token’); if (token) { config.headers.Authorization = `Bearer ${token}`; } return config; }, error => { return Promise.reject(error); […]
⚡ Memoization = Performance Repeated calculations are slow. Memoization caches results. Speed up functions, improve performance. 📝 Memoization Basics // Simple memoization function memoize(fn) { const cache = {}; return function(…args) { const key = JSON.stringify(args); if (cache[key] === undefined) { cache[key] = fn(…args); } return cache[key]; }; } // Expensive function function slowFunction(n) { […]
💾 Web Storage = Client-Side Data Need to store data in browser? Web Storage persists data. Preferences, sessions, carts — no server needed. 📝 Web Storage Methods // LocalStorage (persistent) localStorage.setItem(‘key’, ‘value’); const value = localStorage.getItem(‘key’); localStorage.removeItem(‘key’); localStorage.clear(); // SessionStorage (session only) sessionStorage.setItem(‘key’, ‘value’); const value = sessionStorage.getItem(‘key’); sessionStorage.removeItem(‘key’); sessionStorage.clear(); // Store objects const user […]
📚 Z-Index = Stack Order Elements overlap. Z-index controls stacking order. Modals, tooltips, dropdowns — proper layering. 📝 Z-Index Basics /* Basic usage */ .modal { z-index: 1000; position: fixed; } .tooltip { z-index: 100; position: absolute; } .dropdown { z-index: 50; position: relative; } /* Stacking context */ .parent { position: relative; z-index: 1; […]
🧠 Memory Diagnostics = RAM Testing Faulty RAM causes crashes. Memory Diagnostics tests your RAM. Find bad memory, fix instability. 📝 Running Memory Diagnostic # Open Memory Diagnostic – Search: “Windows Memory Diagnostic” – Or: mdsched.exe (Run) # Options 1. Restart now and check for problems 2. Check for problems the next time I start […]
🎬 AI YouTube Scripts Video scripts take time. AI generates YouTube scripts — hook, body, call-to-action. Create engaging videos. 📝 The Prompt Generate a YouTube video script for: Topic: [Your topic] Duration: [e.g., 5-10 minutes] Target Audience: [e.g., beginners, experts] Style: [e.g., educational, entertaining] Provide: 1. Video Title Options (3-5) 2. Description (SEO optimized) 3. […]
🔧 Environment Variables = Configuration Hardcoding config is bad. Environment variables externalize configuration. Different environments, same code. 📝 Using Env Variables # Docker Compose with env version: ‘3.8’ services: app: image: myapp:latest environment: – NODE_ENV=production – DB_HOST=database – DB_USER=postgres – DB_PASSWORD=postgres env_file: – .env – .env.production # .env file NODE_ENV=production DB_HOST=localhost DB_USER=postgres DB_PASSWORD=secret # Using […]
⏰ CronJobs = Scheduled Tasks Regular tasks need automation. CronJobs schedule tasks in Kubernetes. Backups, cleanup, reports — automatic. 📝 CronJob Setup apiVersion: batch/v1 kind: CronJob metadata: name: daily-backup spec: schedule: “0 2 * * *” # Daily at 2 AM jobTemplate: spec: template: spec: containers: – name: backup image: alpine:latest command: – /bin/sh – […]
⌨️ WP-CLI = WordPress Command Line Admin panel is slow. WP-CLI manages WordPress from command line. Fast, automated, powerful. 📝 WP-CLI Setup # Install WP-CLI curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar chmod +x wp-cli.phar sudo mv wp-cli.phar /usr/local/bin/wp # Check installation wp –info # Common Commands wp –help # Show all commands wp core # Core management wp […]
📐 Composition = Great Photos Great photos start with composition. Composition techniques create stunning images. Balance, rule of thirds, leading lines. 📝 Composition Tools # Rule of Thirds Grid – Enable: View → Show → Grid – Or: View → Show → Rule of Thirds – Or: Crop tool → Overlay options # Golden Ratio […]
🔍 Find & Replace = Code Search Power Manual search is slow. Find & Replace finds and changes anything. Code, comments, files — all instantly. ⌨️ Find & Replace Shortcuts Ctrl + F → Find (current file) Ctrl + H → Replace (current file) Ctrl + Shift + F → Find in Files (all files) […]
📦 ValueTuple = Lightweight Tuples Return multiple values without creating classes. ValueTuple is lightweight, value-based, convenient. 📦 Tuple (Reference Type) var result = Tuple.Create(1, “Alice”); int id = result.Item1; string name = result.Item2; ✅ ValueTuple (Value Type) var result = (Id: 1, Name: “Alice”); int id = result.Id; string name = result.Name; 🎯 ValueTuple Examples […]
📦 Object Initializers = Clean Creation Constructors with many params are messy. Object initializers create objects cleanly. Readable, concise, flexible. ❌ Constructor public class User { public string Name { get; set; } public int Age { get; set; } public string Email { get; set; } public User(string name, int age, string email) { […]
📊 Views = Virtual Tables Complex queries repeated everywhere. Views simplify them. Create once, use like a table. 📝 Create View CREATE VIEW active_users AS SELECT id, name, email, created_at FROM users WHERE status = ‘active’ AND last_login > ‘2024-01-01’; — Query the view SELECT * FROM active_users; — View with JOIN CREATE VIEW order_summary […]
🏥 Health Checks = Monitoring Apps fail silently. Health checks monitor app health. Database, cache, services — all in one. 📝 Health Check Setup # Install package dotnet add package Microsoft.AspNetCore.Diagnostics.HealthChecks # Program.cs var builder = WebApplication.CreateBuilder(args); // Add health checks builder.Services.AddHealthChecks() .AddDbContextCheck() .AddUrlGroup(new Uri(“https://api.example.com”), “External API”) .AddCheck(“Custom”) .AddCheck(“Memory”, new MemoryHealthCheck(512)); var app = builder.Build(); […]
🍒 Cherry-pick = Selective Commits Don’t need all commits? git cherry-pick applies specific commits. Choose what to bring, leave the rest. 📝 Cherry-pick Commands # Cherry-pick a single commit git cherry-pick commit-hash # Cherry-pick multiple commits git cherry-pick hash1 hash2 hash3 # Cherry-pick range of commits git cherry-pick hash1..hash5 # From hash1 to hash5 git […]
📡 GraphQL = Modern API Query REST has over-fetching. GraphQL gets exactly what you need. One endpoint, flexible queries. ❌ REST (Over-fetching) GET /api/users/1 // Gets ALL fields { id, name, email, address, phone, createdAt, updatedAt } ✅ GraphQL (Exact) query { user(id: 1) { name email } } // Gets ONLY what you ask […]
⚡ Async/Await = Modern Async Promises are good. Async/Await is better. Write async code like sync code. Cleaner, more readable. ❌ Promise Chain fetchUser() .then(user => fetchOrders(user)) .then(orders => fetchDetails(orders)) .then(details => console.log(details)) .catch(err => console.error(err)); ✅ Async/Await try { const user = await fetchUser(); const orders = await fetchOrders(user); const details = await fetchDetails(orders); […]
🖼️ IFrames = Embed Content Need to embed external content? IFrames embed videos, maps, forms — any external page. 📝 IFrame Basics <!– Basic iframe –> <iframe src=”https://example.com”></iframe> <!– With dimensions –> <iframe src=”https://example.com” width=”600″ height=”400″></iframe> <!– Full features –> <iframe src=”https://example.com” width=”100%” height=”500″ title=”Example Site” allowfullscreen loading=”lazy” sandbox=”allow-scripts allow-same-origin” ></iframe> <!– YouTube Embed –> […]
📐 CSS Units = Perfect Sizing Wrong units break designs. CSS units matter. px, em, rem, vh, vw — choose wisely. 📝 Unit Types /* Absolute Units */ px → Pixels (fixed) pt → Points (print) pc → Picas (print) /* Relative Units (Font) */ em → Relative to parent font-size rem → Relative to […]
📋 Clipboard History = Copy Multiple Items One copy at a time is slow. Clipboard History stores multiple items. Copy once, paste anytime. 📝 Enable Clipboard History # Enable Win + V → Turn on OR Settings → System → Clipboard → Clipboard history # Open Clipboard History Win + V # Features – Store […]
📱 AI Social Media Captions Social media needs engagement. AI generates captions — Instagram, LinkedIn, Twitter. Engaging, shareable, effective. 📝 The Prompt Generate social media captions for: Topic: [Your topic] Platform: [Instagram, LinkedIn, Twitter, TikTok] Tone: [e.g., inspirational, educational, funny] Target Audience: [e.g., professionals, creatives] Provide: 1. Instagram Caption (5 options) – Hook in first […]
📋 Container Logs = Debugging Power Containers fail silently. Container logs reveal everything. Debug, monitor, track problems. 📝 Log Commands # Show logs docker logs container_name # Follow logs (real-time) docker logs -f container_name # Last N lines docker logs –tail 100 container_name # With timestamps docker logs -t container_name # Since specific time docker […]
🔌 Service Types = How to Expose Apps Pods need access. Service types control exposure. ClusterIP, NodePort, LoadBalancer — choose right one. 📝 Service Types # ClusterIP (Default) apiVersion: v1 kind: Service metadata: name: internal-app spec: type: ClusterIP selector: app: myapp ports: – port: 80 targetPort: 8080 # NodePort apiVersion: v1 kind: Service metadata: name: […]
📝 ACF = Advanced Custom Fields WordPress fields are limited. ACF creates custom fields. Any field type, any layout — flexible content. 📝 ACF Field Types # Text Fields – Text – Text Area – WYSIWYG Editor – Number – Email – Password # Choice Fields – Select – Checkbox – Radio Button – True […]