Slice in Go

A big limitation of static arrays in Go is the fact that once the array is created, it has a fixed size.

The slice overcomes this limitation by having variable size and allowing for elements to be added or removed.

Creation:

You declare a slice by specifying the element type prefixed with [], along with the name of the slice:

var sandwich []string

This code creates an empty slice named sandwich where each item is a string.

Initialization I:

You can also initialize a slice at declaration by using := with a slice literal: the slice type followed by the values inside curly braces {}, with a comma between each entry, like this:

sandwich := []string{"peanut butter", "jelly", "bread"}

We created a slice named sandwich which consists of 3 items: "peanut butter", "jelly" and "bread".

Initialization II:

Another way of initializing a slice at declaration is by listing all elements explicitly in a slice literal, like this:

animals := []string{"cat", "cat", "cat", "cat", "cat"}

We created a slice named animals which consists of 5 "cat" items.

Assignment
Follow the Coding Tutorial and let's create some slices!

Hint
Look at the examples above if you get stuck.