Methods

Methods are functions that are attached to a variable.

All built-in data types (Strings, Lists, etc.) have their own methods.

Use the dot . operator to call a method.

$text = 'Tipsy Turtle'

$text.contains('Turtle')
//= true

$text.length()
//= 12  (includes spaces)

Methods can be chained together.

$text = 'I see a Tarantula.'

$yell = $text.upperCase().replace('.', '!!!')

//= 'I SEE A TARANTULA!!!'

Modules 

A module is a bundle of functions that are related to each other.

THT comes with essential modules like Math, File, and Input.

Math.pi()
//= 3.1415926535898

File.read('words.txt')
//= (contents of 'words.txt' file)

Input.get('sort')
//= (value of the 'sort' parameter in the URL)