Course of Raku / Advanced / Containers

Ordered containers

Ordered containers keep several elements and preserve their order, so each element can be reached by its position. (In special cases they may also hold a single element or none at all.) The most common ordered containers are arrays and lists.

The @ sigil tells you that a variable is meant to hold many elements. A variable with the @ sigil supports subscripting, so you can read an element by its index, as you already saw in the Essentials part.

In this section, we take a closer look at how arrays and lists differ as containers: which of them you can modify, what happens when you put one container inside another, and how binding gives a name to a container without copying anything.

Topics in this section

• Arrays
• Lists
• Binding with :=
• Flattening and itemisation

Practice

Complete the quizzes that cover the contents of this section.

• Quiz — Arrays and lists
• Quiz — Nesting arrays

Exercises

This section contains 3 exercises. Examine all the topics of this section before doing the coding practice.

1. Alias an array
2. Flatten the parts
3. Bind a scalar

Course navigation

← Solution: Typed or untyped   |   Arrays →