Module 1: Slices (The Dynamic Tray)

📚 Module 1: Slices

Course ID: GO-105
Subject: The Dynamic Tray

In Go, we rarely use fixed-size arrays. We use Slices. A slice is like a tray that can stretch or shrink as you add more items.

---

🏗️ Step 1: The Stretch Rule

🧩 The Analogy: The Magic Tray

• Imagine you have a tray for 3 cookies.
• You want to add a 4th cookie.
• In some languages, you’d have to throw away the tray and buy a new one.
• In Go, the Slice automatically buys a bigger tray for you and moves your cookies over!

---

🏗️ Step 2: Slice Operations

1. Creation: mySlice := []int{1, 2, 3}
2. Adding: mySlice = append(mySlice, 4)
3. Slicing: half := mySlice[0:2] (Taking a portion of the tray).

---

🥅 Module 1 Review

1. Slice: A dynamic array that grows automatically.
2. Append: The most important tool for adding data.
3. Length vs Capacity: How many items are there vs. how many could fit.

:::tip Slow Learner Note When you use append, always re-assign the result: slice = append(slice, val). It ensures you don’t lose your cookies when the tray stretches! :::