What are the differences between Go maps and slices?

What are the differences between Go maps and slices?

Go maps are key-value pairs, while slices are dynamic arrays. Maps allow for fast lookups, whereas slices are ordered.

Can you give me an example of how to use a map in Go?

Sure! Here's a simple example:

myMap := make(map[string]int)
myMap["apple"] = 5
myMap["banana"] = 3
fmt.Println(myMap) // Output: map[apple:5 banana:3]

What about slices? How do they work?

Slices are created using the [] syntax. For example:

mySlice := []int{1, 2, 3}
mySlice = append(mySlice, 4)
fmt.Println(mySlice) // Output: [1 2 3 4]

When should I use a map instead of a slice?

Use a map when you need fast lookups by key. Use a slice when you need ordered data or to maintain a sequence.