Learn programming with code examples for and SQL. Explore substring extraction, generalized method declarations, and database queries. Study SQL joins, grouping, and data types. Access curated code from books and online sources.
by Fedor Obraztsov★ 5.03 ratingsEducationFreeData updated 2026-09-06
Learn PLC programming with simulations for Siemens S7-1200/S7-1500 and Allen-Bradley ControlLogix/CompactLogix controllers. Create logic programs, troubleshoot systems, and use TIA Portal, RSLogix, and Studio 5000.
Perform CRUD operations on MySQL databases. Use SSH tunneling with password or key authentication. Enable SSL for secure connections. Access smart IntelliSense and SQL formatting. View and explain query execution plans.
Grammar focusing on with clear explanations and real-world examples. Practice through interactive exercises. Track progress and review mistakes. Access lessons anytime for consistent learning.
: Follow step-by-step tutorials, write and run code using an in-built compiler, take quizzes, and track progress. Access lessons without prior coding experience and explore Java fundamentals.
Learn Swift programming with tutorials, code examples, and tips to improve code security and efficiency. Access structured lessons to build iOS applications. Explore practices for writing optimized code.
Learn through interactive conversations and real-world scenarios. daily dialogues for everyday situations. Use dual language support to read and listen simultaneously. Receive instant feedback on pronunciation and grammar.
Allows users to study basic and advanced SQL concepts. Users can insert, update, delete, and query documents. They can also sort and limit results, create and drop collections.
Learn with detailed explanations and examples. Identify tense types including simple past, past continuous, and past . Practice with exercises and quizzes. Review grammar rules and sentence structures for accurate usage.
Write, test, and share JavaScript, CSS, and code snippets. Support multiple languages including JS, JSX, TypeScript, CSS, SASS, SCSS, PostCSS, Less, , and Pug. Use quick shortcuts and code suggestions for faster coding.
Convert numbers between bases 2 to 30 with real-time updates. Perform calculations in multiple number systems. Display results accurately with a clean, intuitive interface. Switch between bases instantly for precise outputs.
Programming with code examples and projects. Study Express.js for backend . Explore MongoDB for database management. Access offline content without ads. Complete code examples and build projects. Track progress through practical exercises.
Learn with focused vocabulary building using the Ebbinghaus memory method. Study curated word decks covering TORFL/CEFR levels and business terms. Customize daily word count and track progress.
View residential and construction plans. Explore sample layouts and schedules. Calculate service loads for residential premises. Access interactive tools for load calculations. Review worksheets and plans for code compliance.
Inspect web pages with built-in DevTools to view source code, static resources, API requests, cookies, and storage. Change User-Agent to test across devices and browsers. Inject custom JavaScript to modify pages or simulate environments.