Chapter 5.1: Lists

When you’re dealing with lots of data, keeping it all organized can get tricky. That’s where lists come in!

A list is a flexible container type that can store multiple values in order. It can grow, shrink, and even reverse its contents. You can store any type inside a list, numbers, strings, functions, or even other lists. Each value is easily accessed using indexing.

Creating a List

You can create a list by placing values inside square brackets [], separated by commas:

obj my_favorite_foods = [
    "Pizza",
    "Burgers",
    "Sandwiches",
];

Adding Values to a List

To add a value to the end of a list, use the push function. It takes two arguments: the list you want to modify, and the value to add.

obj five_numbers = [1, 2, 3, 4];
push(five_numbers, 5); # five_numbers is now [1, 2, 3, 4, 5]

Accessing Values with Indexing

Each item in a list has an index, which starts at 0 and goes up to length - 1. You can retrieve a value at a specific index using the retrieve function:

obj list_with_four_elements = [1, 2, 3, 4];
obj first_element = retrieve(list_with_four_elements, 0); # retrieves 1

Other List Operations

Lists come with a bunch of built-in operations, like append, remove, reverse, and more that make them super powerful for managing data. A full list of available operations is in the list documentation.

Your Challenge 🤔

Use a list and walk loop to store the user input of Enter some text to store: 5 times.

Answer

obj user_inputs = [];

walk i = 0 through 5 {
    obj input = chew("Enter some text to store: ");
    push(user_inputs, input);
}