Swift 6: Основы 2025 - Урок 9. Словари (Dictionary) в Swift — коллекция, которую вы обязаны знать

In this lesson, we'll explore dictionaries in Swift—one of the most powerful and frequently used data structures. We'll learn how to store data in key-value format, quickly find elements, and add, modify, and delete pairs. You'll learn how dictionaries work under the hood, how they differ from arrays and sets, and which real-world problems they're indispensable for. No complex theory—just practical, real-world examples, and clear explanations. Sign up for the "June in 5!" course: Telegram: @WladMadi Phone: +7 (967) 901-73-24 Learn more about the course: https://madi.study For individual training: Telegram: @WladMadi Phone: +7 (967) 901-73-24 Link to Telegram chat: https://t.me/+SBRqlvcbDWQ0ZGNi 🎯 Who is it for: Swift beginners who want to master working with collections and write more efficient code. 📚 Lesson Plan: 2:00 — What is a dictionary? A Phone Book Analogy 3:20 — Creating a Dictionary: Literals, Explicit Type Declarations, Empty Dictionaries 6:45 — The count and isEmpty Properties 7:45 ​​— Adding and Modifying Elements with updateValue 9:34 — Removing Elements (nil, removeValue, removeAll) 10:54 — Getting All Keys and Values ​​(keys, values) 12:25 — Comparing and Merging Dictionaries (==, merging) 14:44 — Summary: When to Use a Dictionary vs. Other Collections PS: Hello everyone! My name is Vlad Madi, and you're on the educational channel of the MADI.SPACE digital studio. Here we learn how to develop iOS apps using Swift. On our channel, you can learn Swift and iOS development through playlists.